Oprah's Next Chapter:

David Letterman Opens Up About His Struggle with Depression

Funnyman David Letterman has built his career on making others laugh, but ironically, he says, he struggled with depression behind the scenes. Watch as he tells Oprah about a six-month "sinkhole" in his life—a time when he didn't want to get out of bed—and reveals how he kept the laughs coming.

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