05/12/2011 06:34 GMT | Updated 04/02/2012 05:12 GMT

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. Find out what Rihanna, Pixie Lott, The Saturdays, JLS, One Direction and others wore as they belted out their hits: