Jessica Alba/stunt double nipple slip
 

I searched but didn't find anything which surprised me considering how many Jessica Alba threads there are, but I was just watching Into The Blue (for the action and story of course ;) ), and near the end during an underwater fight sequence, Jessica's character is dragged underwater and the attacker gets a nice grope before getting eaten by a shark. I can't tell if this is her or a stunt double, but it's a nice nipple slip.

I would assume its here, if you watching the making of I believe she dd her own stunts cause she is an expert swimmer.

MrSkin.com viewed the scene and they said that it was a stunt double.

mrskin claim alot thats false. watching the dvd extras will confirm its her as she did her own stunts. i run a celebrity site and noticed this awhile ago

Nice Catch DUDE

Video Interview
 

I have to agree it's a stunt double - when asked on one of the talk shows how she felt about being in a bikini for pretty much the entire movie, she said she really didn't have much choice, because by the time she was on set for filming, they'd completed most of the stunt sequences, and her double was in the bikini's all the time. I'd love for it to be authentic, but from that, I'd have to say probably not...