Guest Stars Stephen Mulhern as Himself Ashley Roberts as Herself Simon Cowell as Himself Olly Murs as Himself Alesha Dixon as Herself Amanda Holden as Herself Leigh Francis as Keith Lemon Stacey Solomon as Herself Diversity as Themselves Emilia Fox as Herself David Walliams as Himself Kevin Whately as Himself Louis Walsh as Himself Marcus Butler as Himself Alfie Deyes as Himself Neil Overend as Little Ant Haydn Reid as Little Dec James Corden as Himself Caroline Flack as Herself Vicky Pattison as Herself Ashleigh Butler as Herself (Ashleigh & Pudsey) Michael Sheen as Himself (Guest Announcer) The Vamps as Themselves Wet Wet Wet as Themselves