Gary Barlow and Kelly Rowland approach their seats Photograph: Ken McKay/Rex FeaturesColdplay at Wembley Arena, where they performed Paradise and Charlie Brown from their latest album, Mylo XylotoPhotograph: Ken McKay/Rex FeaturesWestlife – formally managed by Louis Walsh – took to the X Factor stage for the last time after announcing they had split up Photograph: Ken McKay/Rex FeaturesA host of contestants from this year's competition – with Janet Devlin in the foreground – perform in front of the judgesPhotograph: Ken McKay/Rex Features23 year-old runner-up Marcus Collins, who was mentored by Gary BarlowPhotograph: Ken McKay/Rex FeaturesMarcus Collins performs Damien Rice's Cannonball Photograph: Ken McKay/Rex FeaturesLittle Mix on stage. They've become the first ever group to win The X FactorPhotograph: Ken McKay/Rex FeaturesLittle Mix sing CannonballPhotograph: Ken McKay/Rex FeaturesAn ecstatic Tulisa Contostavlos with Little Mix Photograph: Ken McKay/Rex FeaturesGary Barlow consoles Marcus Collins as Tulisa and Little Mix react to the girl group's winPhotograph: Ken McKay/Rex FeaturesThe result sinks inPhotograph: Ken McKay/Rex FeaturesContestants gather on stage for a final sing-a-long Photograph: Ken McKay/Rex Features