X Factor host Dermot O'Leary has dressed up as X Factor contestant, Wagner, for the Christmas edition of Heat magazine, which is out now. 

Speaking about the experience, O'Leary said: "I don't know if Wagner's virility will rub off on me, but I didn't foresee this in my wildest dreams. I've never felt like such a man."

O'Leary also revealed what the inside of the judges' dressing rooms really looks like: "Cheryl has a great selection of Haribo in her dressing room, Dannii's entourage is all male, and Simon's room is like his house – monochrome, with Sinatra pictures."

Watch Wagner performing Sir Elton John's 'I'm Still Standing' and 'Circle of Life' on last Saturday's show (November 13) below: