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David Letterman's giving new meaning to the term boob tube. 

Hot on the heels of Eva Longoria's revealing visit  to the talk-show host comes Courteney Cox with some oversharing of her own. 

During her appearance on the Late Show last night, Letterman surprised the Friends star with a paparazzi shot of her frolicking in the water in St. Barts in a skimpy bikini, where Cox admitted to a "little nipple slip."

The Scream 4 star also continued her raunch tour today, popping into Howard Stern's Sirius radio show this morning where she talked about her sex life, David Arquette's private parts and what movie star she (shockingly) made out with.

WATCH: Cox and Arquette unite for charity