Sarah Harding, Kimberley Walsh and Nicola Roberts attended the show but one member of the girlband was missing – Nadine Coyle.
Cole, 27, put on a sexy performance of her new single Promise This, dressed in knee-high zebra print tights, leather boots and a revealing white and black jacket, as the judge swapped her hot seat for the stage.
Prior to the performance, she told British newspaper The Daily Star: 'I feel like I'm two different personalities. I have to be a judge first, then put on my performer head. But I will continue doing both until I don’t want to anymore.'