Significant others: Was in a high-profile relationship with Britney Spears, then Cameron Diaz, and has most recently been linked to Jessica Biel

One minute rundown: Along with Britney, Christina and actor Ryan Gosling, the trousersnake started his ascent into showbiz with the Mickey Mouse Club for two years, until at age 14 he was chosen as part of hot boy band N Sync, in 1995. Managed by the same peeps who brought us the Backstreet Boys and New Kids On The Block, the group shot to fame with hits like Tearin' Up My Heart and I Want You Back - oh how we danced!

The group went on a sell out tour, their first album was a success and Justin and Britney, childhood friends, announced that they were dating. The world went crazy - oh how we rejoiced! The band's third album, No Strings Attached, soared to the number one spot and sold over two million copies in its first week - they were even nominated for three Grammys. In 2002, Justin went solo and broke up with Brit after she was accused of cheating (gasp!).

His song, Cry Me A River, said to be about her, was a massive success and in 2003 he went on tour with Christina Aguilera and hooked up Cameron Diaz, and in 2004 he won a Grammy - Best Pop Vocal Album for his solo album, Justified. Poor Justin had nodules removed from his vocal chords in 2005, but also launched a clothing line with his best mate, Trace Ayala. In 2006 he won two Grammys for his second album and in 2007, it was announced that his four year relationship with Diaz was over (sob). He's recently been seen out and about with Jessica Biel however, so he's still 'bringing sexy back' somewhere, at least.