Exhibitionist comedienne KATHY GRIFFIN undressed for DAVID LETTERMAN on his late show to make sure poor Dave wasn’t left out of the loop after she did something similar for ANDERSON COOPER at Times Square on New Year’s Eve.

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The 51-year-old redhead, who happens to have the most comedy specials of any comedian (maybe because she likes taking her clothes off?), bared her nearly naked torso for the late night show host after recruiting him to help her with her zipper. For someone who’s past her half-century mark, Kathy‘s toned bod could strike envy in women half her age…

KIRSTIE ALLEY recently confronted talk show host DAVID LETTERMAN about all the fat jokes he ever made about her on his show. She even read them all off a piece of paper!

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But hey, it was all in good fun. Kirstie, who appeared as a guest on the ‘Late Show with David Letterman’ yesterday, asked David:

“Do you love me still? Because I feel I’m a little estranged from you. I thought you loved me madly and then you would talk about me being sort of… “chub.” But some of your jokes we’re funny!”

Michael Lohan attempted to book Lindsay Lohan on Letterman to boost her career, almost sealed the deal, and then got shut down by Lindsay herself. Lindsay Lohan was scheduled to appear on Letterman tomorrow and read the day’s Top Ten list. A pretty solid gig, honestly for the publicly disgraced star.

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Except Lindsay had no desire to appear on the show. Whoops, Michael – it may have behooved you to check with her first. After the news leaked to the media, the show released this statement:

Snooki told David Letterman last night that she does not drink much. Her answer was in response to David’s question if she was a drinking problem. It was sad and yet humorous at the same time because of what she said.

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Snooki says she only drinks in the summer and when she goes clubbing. Isn’t that all the time?

Justin Bieber made an appearance on The Late Show with David Letterman tonight. Justin was there doing his promo rounds promoting his upcoming 3D movie “Never Say Never.”

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 David said he heard young girls screaming like crazy when Justin came in. He wanted to know if that happens to Justin everywhere else? Justin said a lot of places. David then asked if Bieb used the Twitter device to update his activities? He said yes.

P Diddy talks sexting and taking pictures of your thingy and Brett Favre with David Letterman! It’s hilarious! Watch video below.

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David asking Diddy: When you are the owner of the NFL team and you had a problem arise the way the Vickings and the Jets had a problem with the quarterback Brett Favre of taking pic of his hmm you know.

Diddy: Yeah yeah yeah yeah

David: How would you handle something like that?