As the X Factor final lurches terrifyingly towards its conclusion this weekend, a glittering lineup of celebrity guests has just been revealed in the now traditional X Factor final press conference.

Each of the four finalists has been lined up for a celebrity duet, and this year, Simon Cowell and co. have pulled out all the stops to ensure maximum wow factor is achieved.

Teen heartthrobs One Direction will be performing with recent boyband convert Robbie Williams while the silky-voiced Rebecca Ferguson will team up with Christina Aguilera.

Matt Cardle will be attempting to out-warble Rihanna while "mini-Cheryl" Cher Lloyd, unsurprisingly will duet with Cheryl's best mate Will.i.am.