Last night, Joseph Gordon-Levitt visited Late Night to perform karaoke with Jimmy Fallon. He may not be an expert singer...but he does a pretty good Axl Rose impression.
Seth Rogen appeared on The Daily Show to tell the true story behind 50/50, and how Will Reiser, the writer of the movie who based it on his own experiences, was more upset about his unsuccessful sex life than about his cancer.
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Marisa Tomei showed up on Conan to complain about starring in "The Double-Fudging of Vanessa Del Rio" and attending George Clooney's pool party where lake-jumping is mandatory.
Finally, Anna Faris talked to David Letterman about being hired for a frozen yogurt commercial because she was "chunky."