In pictures: Justin Bieber turns 18

1 March 2012 Last updated at 14:36 GMT

As Justin Bieber turns 18, Newsbeat takes a look back at his career so far in pictures.
Justin Bieber
Justin Bieber celebrates his 18th birthday today (1 March) and has announced the name of his new single - Boyfriend. Newsbeat takes a look back at his career so far in pictures.
Justin Bieber and mother Pattie Mallette
Justin Bieber was born on 1 March, 1994. His mother, Pattie Mallette, raised him in Ontario, Canada. They were photographed together at the 2011 Country Music awards.
Justin Bieber and Usher
Bieber was discovered at the age of 13 after uploading videos to YouTube of himself singing. Usher signed the young singer to his record label in 2008.
Justin Bieber and Usher
Usher went on to mentor Bieber, and the pair performed together at the Grammy Awards in 2011.
Justin Bieber
Bieber's debut single One Time was released in 2009 and reached number 11 in the UK singles chart. His biggest hit to date is Baby, which reached the top five in both the UK and the US.
Justin Bieber at Radio 1
Bieber has a dedicated fanbase who often turn up to his promotional appearances. Many British fans turned up to meet the singer during his first visit to Radio 1.
Justin Bieber
Bieber won the Brit award for international breakthrough act at the 2011 ceremony.
Justin Bieber
Last year, the singer appeared in Never Say Never - a film which documented Bieber's preparation for his biggest concert to date at Madison Square Garden. The movie was a box office hit both in the UK and the US.
Justin Bieber and Fearne Cotton
The singer was interviewed by Radio 1 DJ Fearne Cotton in December 2010.
Justin Bieber and Barack Obama
In December, Bieber sang with US President Barack Obama and his family during the filming of Christmas In Washington.
Justin Bieber
Bieber will release a new single - Girlfriend - on 26 March. The song was co-written by Mike Posner and is taken from Justin's upcoming third album, Believe.