The X Factor 2010 Final: Rebecca's duet is with someone who she's idolised for years. International superstar Christina Aguilera joins Rebecca on stage for a Beautiful diva duet!
The X Factor 2010 Final: She's already performed once this evening with our very own Rebecca Ferguson - but now she's back for one more! Treating us to Express from her soundtrack album Burlesque - it's Christina Aguilera!
