Watch Sir Paul McCartney Get Down at Last Night's Lady Gaga Concert 1.58K Marie Bardi 02/22/11 02:25PM Filed to: caught in the act caught in the act Paul McCartney lady gaga TV Video Apparently, music legends as big as the Beatles can still be "little monsters," as evidenced by this video of Sir Paul McCartney dancing at Lady Gaga's Madison Square Garden show. [Buzzfeed]