In his new memoir, Ahmir "Questlove" Thompson describes his life in music — and how he mimicked beats at just 10 months old. Danny Clinch/Grand Central Publishing hide caption

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Jimmy Fallon says he spends almost 12 hours each day at the Late Night offices, which makes the rest of his life difficult. "If I want to play video games now, I have to schedule it," he tells Terry Gross. Virginia Sherwood/NBC hide caption

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Comedian Jimmy Kimmel interviews Mel Brooks on Jimmy Kimmel Live. Randy Holmes/ABC hide caption

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Conan O'Brien interviews Bruce Willis in a 2005 episode of Late Night With Conan O'Brien. NBC/Getty Images hide caption

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Jay Leno delivers the opening monologue during the inauguration of The Tonight Show with Jay Leno on May 25, 1992. Craig Fujii/AP hide caption

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David Letterman, pictured here in January 1982, premiered Late Night With David Letterman just a few months after his Fresh Air interview. AP hide caption

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