In Monster's Ball (2001)
This wasn't the first time Halle Berry had dropped her kit for a movie that'd be the otherwise forgettable Swordfish but it was the first time she had a valid reason to do so. As a woefully repressed recent widow, baring her body to Billy Bob Thornton's prison guard was the equivalent to baring her soul. Plus, it was totally hot. Marc Bernardin
Kristen Stewart isn't shy in ''On the Road''; see others who've disrobed for a role. (Hey, people! The human body is nothing to snicker at! Okay, maybe sometimes...)