Music
Rex Features
The two acts will join JLS, Lady GaGa, Tinchy Stryder, Lily Allen, Noisettes, Pixie Lott and Taio Cruz at the event, which takes place at London's O2 arena.
The Jingle Bell Ball supports Capital FM's flagship charity Help A London Child, with a donation being made from the proceeds of the event.
Last year's Ball saw performances from Pussycat Dolls, Boyzone, Alphabeat, James Morrison, Craig David, Sugababes and Will Young.
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