Apparently, Britney Spears is out to prove she's not a girl and very much a woman. Just days after baring her soul on Dateline, the pregnant pop tart is baring, well, everything else, for the cover of the August issue of Harper's Bazaar. The magazine confirmed Wednesday that Spears posed in the nude for the cover and an accompanying feature story and photo spread at a shoot on Thursday. Unfortunately for Harper's, said photos leaked onto the Internet shortly after the conclusion of the shoot and were available on various Websites as of Wednesday afternoon. In the images, a newly...