Presenters Noel Fielding and Sandi Toksvig welcome comedian Lee Mack, writer and actor Griff Rhys Jones, TV presenter Melanie Sykes and comedian Joe Lycett to the famous tent. The celebs face three tricky test set by judges Prue Leith and Paul Hollywood - beginning with a blondies signature challenge, then a testing technical and concluding with the opportunity to reveal their secret passions with their cake showstopper - but which of the famous faces will impress those judges?