Canadian pop star Justin Bieber has surrendered to Toronto police to face charges he assaulted a limousine driver in December.
Mr Bieber, 19, was greeted at the station by a frenzy of television crews, news photographers - and screaming teenage fans.
He was booked less than a week after he was arrested in Florida and accused of drink-driving and other charges.
His management team have not responded to requests for comment.
On the evening of the alleged incident in Toronto, the Ontario-born pop star attended a Maple Leafs hockey game, Canadian broadcaster CBC reported.
Police officials say Mr Bieber will appear in court at a later date.
Also on Wednesday, a petition requesting Mr Bieber's expulsion from the US gained 100,000 signatures.
The petition was filed on a White House website by a member of the public.
The US president has no power to order an individual's deportation, and it is unclear whether the White House will respond to the petition.
Drink-driving arrest
In the early morning hours last Thursday, Mr Bieber was arrested in Miami Beach after a police officer pulled him over on suspicion of racing a hired yellow Lamborghini on a public street.
Police estimated he and a member of his entourage - who was also arrested - were driving at 55mph (88.5km/h) in a 30mph zone flanked by apartment buildings, a school, a youth centre and a golf course.
Suspecting he was intoxicated, the officer arrested him.
Mr Bieber was also charged with resisting arrest and driving on an expired licence.
After appearing in front of a Florida judge last week via teleconference, while wearing orange jail clothing and with his hands clasped in front of him, Mr Bieber posted bail of $2,500 (£1,500).
Mr Bieber waved to fans as he left jail.
Earlier in January, California police searched Mr Bieber's home for evidence after he allegedly threw eggs at his neighbour's home, causing thousands of dollars in damage.
The outcome of that search is still unclear but one of the singer's associates was arrested for alleged cocaine possession.
The singer's manager tweeted on Wednesday evening asking people "to be kind and hope for the best in people. not assume the worst. Thanks."
His management team said they expected to release a statement later on Wednesday.
Pop star Madonna will introduce two members of Russian protest punk rock act Pussy Riot at a concert promoting human rights in New York City.
The star said she was "honoured" to introduce "my fellow freedom fighters" Maria Alyokhina and Nadezhda Tolokonnikova at the Amnesty event.
"I have admired their courage and have long supported their commitment and the sacrifices they have made," she added.
The pair were released in December after spending 16 months in prison.
They and another woman, Yekaterina Samutsevich, were arrested in August 2012 for singing a protest song in a Moscow cathedral.
Amnesty International announced last week that "Masha" and "Nadya" would make an appearance at the concert on 5 February.
It will form part of their first trip to New York since being granted amnesty by Russian president Vladimir Putin - a gesture the pair dismissed as a publicity stunt.
Lauryn Hill, Bob Geldof, Yoko Ono and Imagine Dragons are also on the bill of the Bringing Human Rights Home event at the Barclays Center in Brooklyn.
The announcement follows Madonna's performance at the Grammys on Sunday and her guest appearance with Miley Cyrus at a MTV Unplugged recording two days later.
She may not have won a major tournament yet, but emerging tennis star Eugenie Bouchard is being tipped as the next marketing face of the women's game.
After an Australian Open in which the 19-year-old Canadian unexpectedly reached the semi-final, there is as much debate about her career off the court as on it.
Her appearance and composure, not to forget tennis talent, have seen her touted as the next Maria Sharapova, the world's highest-paid female athlete, and four times Grand Slam winner.
The teenager's agent, Sam Duvall, says the player known as "Genie" has the personality, game and looks to surpass the Russian's commercial success.
And the global boss of the women's tennis circuit agrees about the financial potential.
'Media exposure'
"She is an incredibly talented athlete, and a very marketable brand ambassador for any company that wants to get involved with her," Stacey Allaster, chief executive of the Women's Tennis Association (WTA), tells the BBC business website.
Named after Princess Eugenie, daughter of Prince Andrew and Sarah Ferguson
Junior Wimbledon winner in 2012
Voted WTA Newcomer of the Year in 2013
Second female Canadian Grand Slam semi-finalist, after Carling Bassett in 1984
"I do believe that with her winning form and continued success that many brands will look to Genie for partnerships."
At present Bouchard has only a handful of brand associations, mostly tennis equipment-related, albeit of a high-profile nature.
Last year Nike asked Maria Sharapova which other WTA player she wanted to wear the clothing line she had designed for the firm, and the Russian chose Genie.
Ms Allaster says her fellow Canadian's attributes - "gracious, humble, confident, smart and funny, she is the whole package" - make Bouchard an ideal fit for partnerships in marketing "categories that play well for our athletes" such as:
fashion
entertainment
lifestyle
cars
financial services
consumer packaged goods
Bouchard shot up from 31st spot to enter the top 20 in the WTA rankings for the first time this week, in 19th place. This time a year ago she was ranked 137th.
"One of the exciting things of my job is to see the juxtaposition between established stars such as Serena [Williams], Maria [Sharapova], Li Na, and the rising stars such as Genie, Madison Keys, Sloane Stephens, Taylor Townsend - without question they will be the future faces of the WTA," says Ms Allaster.
"It is nice to see her stepping forward on the Grand Slam stage, where we have the most fan interest and maximum media exposure, with both groups now set to follow Genie on to future events."
Fan attraction
One of the features of the Australian Open, was the self-styled Genie Army of Australian young, mostly male fans, who attended her games decked out in the red and white of Canada, and showered her with presents of cuddly toys.
During the Australian Open, Bouchard also added some 100,000 new "likes" to her Facebook page, taking that total to 243,000. In addition she has 107,000 followers on Twitter.
The Genie Army was an unexpected feature of the Australian Open tennis
"Genie is giving something back, interacting with fans," says Allaster. "That is why she is going to be a massive success.
"And the Genie Army is going to continue throughout the rest of the year.
"It is great for women's tennis as a whole, because it is all about the fans - we are only in business because of the fans."
When she was 12, Bouchard was the recipient of the Stacey Allaster Tennis Scholarship, set up when the tennis administrator moved from Tennis Canada to the helm of WTA.
"I said to her then I wanted to see another Canadian on the tour, and even then at that young age she assured me that she was going to be be on it," Ms Allaster says.
She adds that when the WTA signed a new three-year partnership deal with Usana sporting supplements in October 2013, the firm asked for Bouchard to be one of the brand ambassadors, even before her breakthrough success in Australia.
'Marketing-savvy'
One sports marketing expert believes more commercial opportunities will soon by spinning Bouchard's way.
"There is not a huge pool of female sporting talent in the world which is globally recognised," says Nigel Currie, of agency Brand Rapport.
Eugenie Bouchard (right) is being compared to Maria Sharapova
"There is a big of a void in that area. Anyone who can get into the top two or three tennis players is of appeal."
He also believes Bouchard has the talent to back up the image, unlike 1990s icon Anna Kournikova, whose commercial deals and celebrity status were never matched by her winning a WTA singles title.
"I think things are different now, brands want to be associated with winning athletes, and there is no doubt that Bouchard has playing ability," says Mr Currie.
And according to WTA chairman and chief executive Ms Allaster, Bouchard also has one very important attribute for a modern sports star.
US and British spy agencies routinely try to gain access to personal data from Angry Birds and other mobile applications, a report says.
A National Security Agency (NSA) document shows location, website visited and contacts are among the data targeted from mobile applications.
It is the latest revelation from documents leaked by Edward Snowden.
In a statement, the NSA said it was not interested in data beyond "valid foreign intelligence targets".
"Any implication that NSA's foreign intelligence collection is focused on the smartphone or social media communications of everyday Americans is not true," the statement said.
'Golden nugget'
The report, published by the New York Times, ProPublica and the Guardian, says the NSA and Britain's GCHQ have worked together since 2007 to develop ways to gain access to information from applications for mobile phones and tablets.
The scale of data gathering is unclear.
But the reports suggest data is gained from variety of mapping, gaming and social networking applications, using techniques similar to the ones used to intercept mobile internet traffic and text message data.
The documents also reveal two agencies increasingly convinced of the importance of mobile applications data.
The joint spying programme "effectively means that anyone using Google Maps on a smartphone is working in support of a GCHQ system" one 2008 document from the British intelligence agency is quoted as saying.
Another GCHQ report, in 2012, laid out how to extract information from Angry Birds user information from phones on the Android operating system. The game has been download 1.7 billion times across the world.
The British spy agency said it would not comment on intelligence matters, but insisted that all of its activity was "authorised, necessary and proportionate".
Another NSA document described a "golden nugget" - a perfect scenario where NSA analysts could get broad selections of information from the applications, including networks the phone had connected to, documents downloaded, websites visited and "buddy lists".
Other applications mentioned by the documents include the photo-sharing site Flickr, movie-based social network Flixster and applications that connect to Facebook.
Developers are responsible for the information generated from each application, but there was no suggestion firms were actively agreeing to give the spy agencies data.
On Monday, the justice department announced it had reached had agreement with five major internet firms over their request to share information about how they responded to orders from the NSA and other agencies.
Google, Microsoft, Yahoo, Facebook and LinkedIn had previously sued the US government over making more information on what they released to intelligence agencies public.
Under the compromise announced, the firms will be able to release:
report the number of criminal-related orders from the government
the number of secret national security-related orders from government investigators, rounded to the nearest thousand
how many national security-related orders came from the foreign service intelligence and the number of customers those orders affected
whether those orders were for just email addresses or covered additional information
As part of the deal, the firms will delay releases of the number of national security orders by six months and promise they cannot reveal government surveillance of new technology or forms of communications they create for two years.
Among the top trends driving smartphone growth are large screen devices and low cost”
Ryan ReithProgram Director, IDC
IDC said this was the first time more than one billion smartphone units were shipped in a single year.
"Among the top trends driving smartphone growth are large screen devices and low cost," said Ryan Reith, program director with IDC's Worldwide Quarterly Mobile Phone Tracker.
"Of the two, I have to say that low cost is the key difference-maker."
"Cheap devices are not the attractive segment that normally grabs headlines, but IDC data shows this is the portion of the market that is driving volume," he said.
"Markets like China and India are quickly moving toward a point where sub-$150 smartphones are the majority of shipments, bringing a solid computing experience to the hands of many."
Smartphone Global Market Share
Ranking
Vendor
Sales
SOURCE: IDC WORLDWIDE MOBILE PHONE TRACKER
1.
Samsung
31.3%
2.
Apple
15.3%
3.
Huawei
4.9%
4.
LG
4.8%
5.
Lenovo
4.5%
South Korea's Samsung extended its market dominance with 42.9% growth, the IDC survey said.
Apple, however, saw its market share decline, posting slower growth than the overall market with 12.9% growth.
Music therapy can help teenagers and young people cope better when faced with treatment for cancer, a study in Cancer journal suggests.
American researchers followed the experiences of a group of patients aged 11-24 as they produced a music video over three weeks.
They found the patients gained resilience and improved relationships with family and friends.
All the patients were undergoing high-risk stem-cell transplant treatments.
To produce their music videos, the young patients were asked to write song lyrics, record sounds and collect video images to create their story.
They were guided by a qualified music therapist who helped the patients identify what was important to them and how to communicate their ideas.
When completed, the videos were shared with family and friends through "premieres".
Positive effect
After the sessions, the researchers found that the group that made music videos reported feeling more resilient and better able to cope with their treatment than another group not offered music therapy.
Adolescents and young people who are resilient have the ability to rise above their illness”
Dr Joan HaaseIndiana University
Also, 100 days after treatment, the same group said they felt communication within their families was better and they were more connected with friends.
These are among several protective factors identified by researchers that they say help teenagers and young adults to cope in the face of cancer treatments.
Lead study author Dr Joan Haase, of Indiana University School of Nursing, said: "These protective factors influence the ways adolescents and young adults cope, gain hope and find meaning in the midst of their cancer journey.
"Adolescents and young people who are resilient have the ability to rise above their illness, gain a sense of mastery and confidence in how they have dealt with their cancer, and demonstrate a desire to reach out and help others."
When researchers interviewed the patients' parents, they found that the videos also gave them useful insights into their children's cancer experiences.
'Feel connected'
Sheri Robb, a music therapist who worked on the study, explained why music was particularly good at encouraging young people to engage.
She said: "When everything else is so uncertain, songs that are familiar to them are meaningful and make them feel connected."
Cancer Research UK says music therapy can help people with cancer reduce their anxiety and improve their quality of life. It can also help to reduce some cancer symptoms and side-effects of treatment - but it cannot cure, treat or prevent any type of disease, including cancer.
Previous studies looking at the effects of music therapy on children with cancer found that it could help reduce fear and distress while improving family relationships.
A spokesperson for Teenage Cancer Trust said getting children with cancer to co-operate and communicate was most important.
"Every day in UK, around seven young people aged between 13 and 24 are diagnosed with cancer. We know that being treated alongside others their own age makes a huge difference to their whole experience, especially if it's in an environment that allows young people with cancer to support each other."
Lorde performing onstage before her big two Grammy wins. Photo / Getty Images
It's two out of four for Lorde. The Auckland singer has won her second Grammy for Song of the Year, after earlier winning the award for best pop solo performance.
She missed out on Record of the Year, which was won by Daft Punk, and Best Pop Vocal Album award, which went to Bruno Mars for his album Unorthodox Jukebox.
Speaking backstage about her Grammy wins, Lorde said "the weirdo won out" and that she was "stoked" about the wins.
Asked about her music and style being "unconventional'', she said: "Yeah, this time the weirdo won out."
She said her highlight of the night was seeing the Daft Punk 'robots' in person, saying she was a "big fan".
The 17-year-old, who is too young to drink alcohol in the US, said she was planning to spend the night "hanging out" with her family and "drinking a lot of sparkling water".
She also revealed she has big plans for the year ahead, but refused to give away what they were, saying simply: "You will find out."
Earlier in the evening, she and producer/co-writer Joel Little - joint winners of the Song of the Year prize - took to the stage to say their thanks to their families, managers and record labels.
"Thanks to everyone who let this song explode," she said.
Accepting their award, Little took the microphone first, saying: "Oh wow, this is intense. Ella's making me go first.
"I just want to say, we made this song originally just to give away for free and to be here now in this room with so many legends and people who we all admire is a complete honour, so thank you for that.''
Little thanked his wife, children and family, as well as his manager and Lorde, adding: "You know I think you're amazing.''
Lorde praised her co-writer and producer Joel Little for her success, saying she wouldn't be on stage accepting awards if it wasn't for him.
"This guy's nurtured me through kind of my first years of song-writing, which I will forever owe him,'' she said.
Lorde with her two Grammys. Photo / Getty Images
Earlier, for her first award win, Lorde took to the stage sounding nervous, opening with a shy "hello".
"This is the one thing I didn't expect the most tonight," she said before paying tribute to her fellow nominees. She didn't thank anyone else -- perhaps indicating she was hoping to thank more later.
"I think mostly to Bruno, to Sara [Bareilles], to Katy, to Justin, I have been so inspired by all of your vocal performances at some point in my life, so thank you."
Lorde and Little join a prestigious list of New Zealanders who have won Grammys.
The first was Kiri Te Kanawa in 1983 for the best opera recording of The Marriage of Figaro.
The most recent was Kimbra, who last year won two - best pop duo/group performance and record of the year with Gotye for Somebody that I Used to Know.
Lorde accepts the Best Pop Solo Performance award for 'Royals' onstage at the Grammys. Photo / Getty Images
Prime Minister John Key said her win had sent Kiwis into a national standing ovation.
"And New Zealand rises to its feet. @lordemusic has won her first Grammy for best pop solo performance. Awesome,'' he tweeted.
Auckland Mayor Len Brown also tweeted his congratulations, saying: "Lorde just made 1.5 million Aucklanders so proud.
"Music history for a 17 year old from the Shore at the Grammys.''
More praise has been pouring in for Lorde, with the New Zealand Olympic team adding their support.
"Way to go @lordemusic! you are #makingusproud BIG TIME!,'' @nzolympics tweeted.
Actor and comedian Rhys Darby posted: "Congrats @lordemusic keeping it so real it's unreal. You're amazing! #Grammys''
Lorde performs Royals onstage during the 56th Grammy Awards. Photo / Getty Images
Earlier, she performed as the second act at the awards ceremony in Los Angeles.
In a move that may come as a surprise to her fans, Lorde did not show up on the red carpet at the 56th Grammy Awards, where celebrities are typically asked which designer they are wearing.
But she was soon seen on stage, as the second performer of the night, singing her smash hitRoyals.
Host LL Cool J introduced her as a "global sensation'' who had taken the music world by storm.
The chart-topper performed a slight rearrangement of the hit song. Her trademark long curly hair was straightened and she wore an unusually conservative outfit of a white buttoned-down sleeveless shirt and black trousers.
The moody performance, with a darkly-lit stage and stone angels in the background, was met with rapturous applause from the star-studded crowd.
It was in stark contrast to the show's opening act, a grinding duet by husband and wife superstars Jay-Z and Beyonce.
Contrary to reports that she would be wearing a New Zealand designer to the awards, the white shirt Lorde wore for her performance was reportedly Prada and the pants by Celine pants.
The clingy black dress she changed into afterwards was reportedly from Balenciaga's fall collection.
New Zealand hip hop DJ and producer P-Money tweeted: "Wow. Big up @lordemusic and her whole crew. That must have been a thrill to perform #grammys"
Earlier today, the North Shore teen tweeted a photograph of herself in her dressing room getting ready for the Grammys, as well-wishes pour in from her fans and celebrities alike.
An estimated 30 million viewers from around the world tuned in to see the 17-year-old perform at the Staples Centre in Los Angeles for the event, which screened live on TV2 today.
The Devonport-born star flew out of Auckland on Tuesday with boyfriend James Lowe, mother Sonja and sister Indy and has since hobnobbed with the music world's elite at pre-Grammy parties.
Meanwhile, her co-writer and producer Joel Little tweeted a picture of himself in his tuxedo and bow-tie with a party cup, saying: "Ok Grammies time, got my cup just like Jay Z, cheers to everyone for the well wishes."
Lorde - the youngest Grammy nominee this year - was the bookies' favourite to take out the gong for best song with Royals, which was No 1 on the Billboard Hot 100 chart for nine consecutive weeks last year - the first time a New Zealand solo artist has reached the US spot.
She was up against Macklemore & Ryan Lewis, Pink, Bruno Mars and Katy Perry .
