Letterman on NBC

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David Letterman is an absolute riot. In this clip, he explains why he's mocking Jay Leno and NBC: It's fun!
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David Letterman Biography

David Letterman Photograph
David Letterman hosts our favorite late-night talk show. His top 10 lists are always good for a laugh. In the summer of 2009, he got into... More »
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David Letterman