After 33 years as the cigar-chomping, larger-than-life face of late-night television, David Letterman, 67, will count down his last top-ten list when the final episode of "Late Show with David Letterman" airs in May. The Indianapolis native grew up worshiping Johnny Carson, and after getting his start as a wisecracking TV weatherman, went on to host both "Late Night" on NBC and "Late Show" on CBS. Renowned for his biting wit and hard-nosed interview style, Letterman has made his name poking fun at his employers and quarreling with guests like Madonna and Cher. Now, as he prepares to say goodbye to the Ed Sullivan Theater, a look back at the career of TV's most lovable misanthrope.

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