President Bush drops by the theater but somehow gets himself locked out; in honor of Oprah's appearance next week, Dave gives everyone in the audience free vodka and Lipitor; throughout the night, Professor Robert Mundell tells Rodney Dangerfield jokes; Alan abruptly starts singing The Black Eyed Peas' "My Humps."
click here to see where to watch or .
Ready to Watch Late Show with David Letterman, Season 13, Episode 53?