World-class shrieker Diane Keaton was on The Colbert Report last night, and it was … sort of a strange appearance. She called Colbert a “sexual pervert,†laughed that she was going to “bring him up on charges,†seemed not to really track how the interview was going, and giggled her way out of every question, for no apparent reason. Colbert rolled with it, even half-joking that she had to “say one fucking thing about the book†before she could leave — which she tried to do before the segment was over. Cute suit, though.