Nicole Scherzinger, Simon Pegg, Nick Frost, Matt Cardle

Westlife, Dermot O'Leary, David Walliams, Mary J Blige

Gary Barlow, Kelly Rowland, Louis Walsh, Tulisa Contostavlos, Tinie Tempah, Terry Wogan, Kasabian

Lady Gaga, Dannii Minogue, Peter Kay, Ed Sheeran

Lee Evans, One Direction

Stars of Life's Too Short, Ricky Gervais and Warwick Davis, as well as DJ Vernon Kay

Christmas Special 2011