Last night David Letterman welcomed Paris Hilton to his show. There to promote her new clothing line, but Dave wanted the lowdown on jail, not fashion. He, like the rest of us, finds the fact that she went to prison, about the most interesting thing about her. Paris gets annoyed and practically begs him to stop. Apparently she was really pissed afterwards and her 'people' have told the Letterman staff she won't be back. Lucky lucky Dave.