You've heard of On Golden Pond? Well, how about On Golden Thong! This is from the trailer of an upcoming movie called "Your Highness" (April 2011), showing Natalie Portman in a gold thong, getting ogled by James Franco and Danny McBride. First the scene in normal speed, then just Natalie in slo-mo. http://www.yourhighnessmovie.net/

ps: yes, I am aware that Miss Portman has already shown her ass, as well as other parts of her anatomy, in other movies.

regarding the "body double" brouhaha:
http://www.theimproper.com/21697/natalie-portman-body-double-scandal-engulfs-your-highness-video