Rochelle played host to several VIP guests including Made In Chelsea star Lucy Watson and singer Alexandra Burke.The winner, to be decided by public vote on Saturday night, is a sure bet to score the Christmas number one. Audition song: Saving All My Love For You - Whitney Houston.

Una Healy and Harry had looked particularly merry after Friday’s celebrations – although Harry was looking remarkably fresh-faced on Saturday morning.

Which successful act are they most like: 3T, the briefly-successful 1990s boyband formed by Michael Jackson's nephews.

Best performance so far: Umbrella - Rihanna [Watch on the X Factor website] Judge's pearl of wisdom: "It's official: I am in the JLS fan club. Superstar advice: "You must always keep the friendship.

I had Take That pillow cases, Take That bed sheets, Take That wallpaper - everything! Recognisable feature: Each member has a "signature colour".

" On the final: "Whatever way the voting goes on Saturday night, I'm going to leave with my head held high knowing: 'Oh my God, I've actually made it to the finals' and that's an achievement in itself." Bookmakers' odds: 8/13 Members: Marvin Humes, 23; Jonathan "JB" Gill, 21; Ortise Williams, 21; Aston Merrygold, 20. Marvin is green; JB is yellow; Ortise is red; Aston is blue.