We know it's only November, but we're gonna call it - Rihanna is the Nakedest Celebrity of 2012. Save some of your applause for the end of this slideshow, in which we salute the main reason why Rihanna's propensity for nudity is universally welcomed: her bodacious Barbadian booty.

We begin with a photo shoot from earlier in the year with Terry Richardson, a man celebrated his ability to get really famous people into really sexy positions. After that, it's a Rihanna reer-trospective (sorry) that may cause you to cheer, gasp, and do a couple extra squats next time you hit the gym. —Samantha Martin