Tonight's "Late Show" with David Letterman offers up a big surprise from the host himself. During today's taping, Dave announced that he'll be retiring from television when his contract runs outin 2015. Letterman is the longest tenured late night host, clocking in at more than 31 years. There is no timetable for his departure, but expect change in the not too distant future.

The other night Letterman, Lady Gaga and Bill Murray took a selfie:

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