Conan O'Brien was initially tapped as a probable successor to David Letterman, but after hosting the "Late Night Show" for 16 years, he earned a great spot as host of NBC's "The Tonight show," until it was ripped away by network politics. The onetime "Saturday Night Live" writer has his own successful late-night talk show on TBS. He is known for his quirky, sometimes-physical comedy and observational humor.
Ben Margot / Associated Press
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