Mark Ronson hits the decks without kecks

Mark Ronson was caught with his pants down last night when a comedy skit with David Walliams went a little too far for his liking.

Cheeky: Walliams and Mark Ronson

The pair were at the Concert For Care at Brixton Academy, and David got rather intimate while in character as failed children's TV presenter Des Kaye.

In character: David Walliams as Des Kaye

Please insert "wisecrack" and "butt of joke" gags here...