Justin Bieber becomes 'X Factor' mentor

Canadian pop superstar Justin Bieber has reportedly agreed to become a celebrity mentor on the upcoming ‘X Factor’ season in the US.

The X Factor Finale: Josh Krajcik, Chris Rene, Melanie Amaro (Videos)

Who among The X Factor top 3 finalists Melanie Amaro, Josh Krajcik and Chris Rene do you think would win the inaugural U.S. season?