The 10 TV finalists came together to sing a string of top tunes at the first date on the Pop Idol tour.
And predictably, Gareth Gates and Will Young were the big hits of the night.
Gareth came on stage to sing his single, Unchained Melody, which is set to knock Will off the top spot when it's released on Monday.
Other highlights were Darius Danesh swinging his hips to It's Not Unusual, and solos from Zoe and Aaron Bayley.
Jessica Garlick, Laura Doherty, Rosie Ribbons and Hayley Evetts also sang live at the gig.