05/12/2011 10:54 GMT | Updated 22/05/2015 10:12 BST

Who Wore What At The Jingle Bell Ball?

The 2011 Jingle Bell Ball attracted some big pop names to its stage at London's O2 Arena this weekend. Click on the gallery below to find out what Rihanna, Pixie Lott, The Saturdays, JLS, One Direction and others wore as they belted out their hits: