Lots of Celebs on Channels 4's live Comedy Gala

The live comedy gala, in aid of children's charity Great Ormond Street Hospital, at the O2 Arena was filled with Celebs. Alan Carr, Jimmy Carr, Michael Macintyre, Lee Evans, Keith Lemon, Jonathan Ross & Co were joined by Jessie J who was treated by the Great Ormond Street Hospital when she was younger.