You'd think celebrities would know better than to get on stage with David Walliams by now, but perhaps Mark Ronson thought he'd be safe. He was wrong. Very wrong. The music super-producer was left red-faced after David Walliams – in character as Little Britain's creepy Des Kaye – yanked his trousers and pants down in front of an audience of hundreds at the O2 Academy in Brixton, exposing his nice little butt to everyone. Eeek! Walliams was doing the sketch as part of the Concert for CARE, but he actually felt a bit bad about it later on. "Mark is a cool, calm character," he said sheepishly. "To put him that position was out of his comfort zone." Oh well, it gives us all something to giggle at. Watch the moment on the video above, but be warned: there's a lot of screaming.
Wanna see Ronson's bum?