Billy Crystal Presents Video Of Celebrities Wishing David Letterman A Happy Birthday On 'Late Show' (VIDEO)

Billy Crystal Offers Celebrity Video Of Happy Birthday Wishes To David Letterman On 'Late Show'

David Letterman turned 65 on April 12, while Billy Crystal is right behind him at 64-years-old. So the two commiserated on the joys of growing older when Crystal appeared on "The Late Show" (weeknights, 11:35 p.m. ET on CBS). Letterman admitted to having difficulty sleeping, but Crystal said he doesn't have that problem.

"I fall asleep deep, deep 11 o'clock," he said. "I fall really [into] a deep sleep, and I wake up ready to start the day refreshed. I look at the clock, it's 1:10 am."

Crystal admitted that his urination is more like morse code now. But really, he wanted to present Letterman with a video montage of all of their celebrity friends who couldn't be there for the celebration, but wanted to wish Letterman a happy birthday.

The video even had a nice graphic as an introduction, but it turned out just to be Crystal in the green room wishing him a happy birthday. Apparently, that was all he could find, or all he bothered to do.

David Letterman is still going strong as host of "Late Show" every weeknight at 11:35 p.m. ET on CBS.

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