Two days after co-star Tom Hanks appeared on the same program, Julia Roberts visited the Late Show last night to chat with David Letterman and promote Larry Crowne. As it turned out, there wasn't much movie-related discussion. But there was a whole bit that involved Letterman peppering Roberts with annoying questions about her kids! He also flipped off the audience. The video, above.

Last week, Tom Hanks appeared on Univision's Despierta America morning show and soon found himself in the middle of a weather report-turned-dance party with sexy co-host Chiquinquira Delgado. It was cute! And when Hanks reminisced about the incident with David Letterman on tonight's Late Show, we couldn't help but feel all warm and fuzzy inside all over again.

Michele Bachmann officially launched her presidential campaign yesterday in Waterloo, Iowa by accidentally comparing herself to John Wayne Gacy, the infamous gay rapist clown serial killer from the '70s. How serious was Bachmann's gaffe? According to David Letterman, who spent four minutes on Monday's Late Show obsessing over it before giving Bachmann a rambling bit of unsolicited campaign advice, very serious!

Last night, Bill Carter—late-night television guru and author of The War for Late Night—stopped by for a chat with Jimmy Kimmel. Immediately, Kimmel took issue with the unflattering physical description of him in Carter's book. Their exchange, inside.