With the final concert approaching, Mika, Lang Lang and Claudia make a surprise late change to the line-up as they get the chosen amateur pianists ready for the big stage.

Claudia Winkleman, Mika and Lang Lang celebrate Christmas at Battersea Power Station in central London. They are joined by some of the stars of series two who perform seasonal favourites, including Walking in the Air, O Holy Night and River. Brad Kella, the winner of this year's series, returns with a show-stopping performance, while Mika and Lang Lang duet on a Beatles classic.