4. Conan Blimp Chase
Conan O'Brien put his blimp to good use last night by stalking Gary Busey.
3. Jay Pharoah Meets David Letterman
The breakout Saturday Night Live impressionist stopped by the Late Show to show off his takes on Eddie Murphy, Denzel Washington and Will Smith, before talking about how he got his gig at Studio 8H.
2. Craig Ferguson's French Copycat
The Late Late Show host discovered that a French talk show host has been
copying his wacky late night format and took a moment in last night's monologue to announce an impending lawsuit.
1. Natalie Portman Breaks a Rib
When David Letterman welcomed the Black Swan actress to the stage, he called her fat, talked to her about the rib she broke during production, and then predicted that she would win an Oscar this year.