Lindsay Lohan -- practical joker or cunning thief? Perez Hilton is reporting that Lindsay's good pal Kelly Osbourne had her purse stolen at a GQ party Saturday night and Kelly's friends are saying that Lindsay herself swiped the bag! "Kelly is so upset and angry," says Kelly's bud. "We're all almost certain that Lindsay stole the purse or threw it in a garbage bin. She thinks doing sh-t like that is funny!" They say Kelly is offering a reward for the return of her belongings, but we're pretty sure that's not why Lindsay took it.