A troupe of X Factor’s most controversial acts are heading back to the show this weekend for one last group performance.

Wagner, Kitty Brucknell, Rylan Clark and Irish pop twins Jedward are among the names pencilled in to perform together on Saturday.

The same night will see guest performances from The Killers and Tom Odell who admitted he was ‘really nervous’ about appearing on the hit ITV show.

He told Absolute Radio’s Pete Donaldson: “I’m worried the pedal on my piano is going to break halfway. We’ve done a bit of TV this year, but I’m not a TV star. I didn’t grow up on TV like some of these people are really used to being in front of a camera. It’s just a very stressful experience, being on TV.

“We counted the other day that I’ve actually broken seven pianos this year. They’ve been really expensive as well. My flat is like a piano orphanage, filled with different pianos.”

The three X Factor finalists have chosen their songs for Saturday with hot favourite Sam Bailey performing a cover of Lady Gaga’s Edge Of Glory then duetting with Nicole Scherzinger on And I Am Telling You from the musical Dreamgirls.

Nicholas McDonald will sing the Robbie Williams hit Candy and perform Westlife’s Flying Without Wings with Shane Filan from the Irish boyband.

Luke Friend is due to perform We Are Young by US band Fun before duetting with Ellie Goulding on her hit Anything Could Happen.

One act will leave the show on Saturday leaving two finalists to battle it out to win.