Yesterday we took a look at the style evolution of Twilight star Kristen Stewart. Today in our special three-part series leading up to tomorrow's release of New Moon, we take a look back at her sexy maybe-boyfriend Robert Pattinson, better known as R-Pattz (or Hot-Pattz, if we had our way). He's known for his questionable hygiene habits, messy hair, and black Nike sneakers. In the past few months he's done some growing up! Well, kind of. See for yourself in the slideshow.