Of course, she wants to do it on purpose. As the What's Your Number? (2011) star tells Black Book magazine:

"[My husband] Chris [Pratt] and I were pitching around a character, a Hollywood-mess character on the red carpet at the opening of a movie.

"She’s talking to these journalists and she’s wasted. One boob is completely out, and she’s talking on and on, like, [Faris slurs] ‘I’m so excited to be here.’ If you held it long enough and kept it going, just the one boob, it would be so funny.”

"Funny" is one word for it..."hot" would be another.

Anna won't say if her idea is based on Tara Reid's 2007 slip at P. Diddy's 35th birthday party [Is it even a slip if the whole boob hangs out?- SC], but considering that incident went down pretty much exactly as Anna describes it, the SKINspiration is obvious.

Speaking of nip slips, you can check out Anna Faris' Anatomy Award-winning downblouse scene in What's Your Number? (2011) right here at MrSkin.com!