7. Justin Bieber
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Who Should Replace Kelly Rowland As A Judge On The X Factor? You Vote
4. 7. Justin Bieber
At seven on our top ten is the man of the moment Justin Bieber. The 'Never Say Never' star is enjoying huge popularity at present thanks to hype about his upcoming third album 'Believe' and the worldwide success of his latest single 'Boyfriend'. At the age of 18 Justin is the youngest contender on our countdown but with four years of chart success under his belt already there's no denying Justin could bring a huge amount of star power to the popular ITV1 show.