Technically, it's three nights - this being the second. But, true, the acts are different each week. Tonight's fodder includes Grammy award winning songstress Rihanna. Live from Fountain Studios, she will be performing her brand new single, Disturbia from her critically acclaimed album Good Girl Gone Bad Reloaded. Joining her is (brace yourselves) Canadian singer Michael Buble (last seen leering over Glenda on a disturbing installment of Xpose) who, as well as hosting the show alongside presenter Denise Van Outen, will also perform his chart topping hit 'Everything'. This variety extravaganza will feature some of the comedy circuits best loved comedians; tonight it's the turn of Edinburgh Fringe Festival favourite, Stephen K Amos and Perrier Award nominee Mark Watson.