Late Show with David Letterman S12E72 Kristin Johnson, Tom Dreesen

Watch Late Show with David Letterman Season 12 Episode 72 Online – Dave's monologue is interupted by a surprise appearance from Billy Crystal (promoting the one-man Broadway show ""700 Sundays""); Dave introduces ""The Nog-Cam;"" 10 carolers present the Top Ten; Broadway star Kristen Johnston opens up to Dave about her recent mugging; Tom Dreesen tells another story about opening for Frank Sinatra.