Rihanna, Will.i.am to Duet With ‘The X-Factor’ Finalists
'The X-Factor,' the U.K. version of 'American Idol,' is in for a dose of star power. For the reality show's upcoming season finale, the final four competitors will be collaborating with some of music's biggest acts, with Rihanna, will.i.am, Christina Aguilera and Robbie Williams set to perform alongside the contestants this Saturday night at 7PM on British channel ITV1...