Other singers wowing the excitable crowd included JLS, The Saturdays and X Factor reject Jamie Archer and that was just a small selection of the celebrities that turned out.
We also spotted Tinchy Stryder, N Dubz, Kesha, John & Edward Grimes, Paloma Faith (is that road kill on her dress?) and the Sugababes who all wore outfits that left very little to the imagination (and not in a good way!)