Jimmy Fallon during his debut Monday as host of NBC's The Tonight Show. Theo Wargo/Getty Images for 'The Tonight Show' hide caption

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President Obama jokes with Jay Leno during a commercial break at the taping of his appearance on The Tonight Show with Jay Leno on Tuesday in Los Angeles. Jacquelyn Martin/AP hide caption

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Seth Myers performs during the Comedy Central South Beach Comedy Festival at the Fillmore Miami Beach in Miami Beach, Fla., April 18. NBC announced Sunday that Myers is the new host of Late Night. Jeff Daly/Jeff Daly/Invision/AP hide caption

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President Obama gestures during his appearance Tuesday (Oct. 25, 2011) on NBC's The Tonight Show with Jay Leno.

Jewel Samad /AFP/Getty Images hide caption

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