Last Christmas Wham!
To celebrate the fact our favourite teen sensation is turning 18 we thought it would be a great chance to look back at some of the 'Baby' singer's best moments over the years.
Justin came to light through a series of cover versions he posted online. After watching the Canadian star perform Usher immediately signed him up alongside Scooter Braun to RBMG who had initially spotted the singer's talent.
The teen star released his first ever single 'One Time' on 19th May 2009 which was written by the team responsible for Beyonce's smash 'Single Ladies (Put A Ring On It)'.
Justin attended his first ever Grammy Awards ceremony in 2010 where he joined Ke$ha on stage for a video link.
Justin has one of the largest fan bases in the world called 'Beliebers'. He spends a lot of time updating his fans on his progress on Twitter and is second only to Lady Gaga for the most followers of all.
Justin flew over to the UK to perform at Capital FM's Summertime Ball at Wembley Stadium in 2010. He performed some of his biggest hits in front of 90,000 screaming fans.
Justin Bieber took to the stage to pick up his first ever MTV Video Music Award in 2010 for his smash hit 'Baby'. The star was presented with his Best New Artist prize from Victoria Justice at the event in Los Angeles.
Justin released his book 'First Step 2 Forever: My Story' back in 2010 which was a tell all tale of his rise to fame and journey through the music business.
Justin joined his mentor Usher backstage at the 38th Annual American Music Awards. He won four awards on the night, including Artist Of The Year and Favourite Pop/Rock Male Artist.
Justin headed to the UK in 2011 for his first ever BRIT Awards and picked up the International Breakthrough Act at London's O2 Arena.
Justin released his 3-D concert film documentary 'Justin Bieber: never Say Never' back in 2011 to huge acclaim. The film follows the star in the ten day run up to one of his biggest ever shows at Madison Square Garden.
Justin is a keen sportsman and is often pictured playing basketball. The singer is always in attendance when he can court side at the Staples Center for the LA Lakers game and managed to play in the All Star Celebrity match where he was also named the MVP.
Justin and Disney star Selena Gomez confirmed reports of their relationship as they stepped out here at the 2011 Vanity Fair Oscar Party.
Justin stopped by London's O2 Arena for three dates on his sold out 'My World' tour. Picture:Ian West/PA Wire
Like any big name pop star, Justin has his own personalised doll. There are many different models available as he aims to keep his Beliebers as happy as possible.
Justin was joined by The Wanted on several dates of his South American tour and the two acts joined forces again at the Westfield shopping centre in London to turn on the Christmas lights last year.
Justin can be seen by tourists all over London after he had his own waxwork model put in the famous museum at Madame Tussauds in 2011.
Justin performed at the MTV European Music Awards 2011 and picked up the nods for Best Male and Best Pop on the night in Belfast.
Justin graced the cover of V Magazine in early 2012. The singer gave a revealing interview where he vowed that he wouldn't be singing about sex or drugs or swearing saying he was more into love. Picture: Vmagazine.com **SECRET CODE IS #GIVEMEBIEBER**