Britney Spears

Live From New York, It's...Seth Meyers Sketches include ""Morman Winter Olympics,"" ""Brian Fellow's Safari Planet,"" ""Inside Barbie's Dreamhouse,"" ""Jarrett's Room,"" ""A Message From Martha Stewart,"" ""Astronaut Jones,"" ""HBO First Look: Gemini's Twin,"" ""Channel 9 Action News,"" and ""The Leather Man."" The host/musical guest performs: ""Boys"" and ""I'm Not A Girl""