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. Cox told Letterman last night she knew the paparazzi were photographing her in her swimsuit, so she "was working it pretty hard": "It became a joke, like, all right, let's see how Sports Illustrated we can get," she said. The Friends star, who's become her own publicity machine, also shocked Stern and her separated hubby when she revealed she hasn't had sex "in a while," loves her vibrator, and once made out with Jim Carrey.