Marcus performs his 2nd track of the night

Little Mix perform their 2nd track of the night

Westlife make their last appearance on the X Factor

Little Mix' first performance of the night

Marcus' first performance of the night

Little Mix strip it back for a tender performance

Marcus takes the stage

Little Mix celebrate as they are announced as winners

Little Mix celebrate as they are announced as winners

Chris Martin fronts Coldplay as they play to the Wembley crowd

Tulisa celebrates with Little Mix

Tulisa celebrates with Little Mix

Little Mix are joined by other finalists during their winner's performance

The X Factor judges

The X Factor finalists sing together