Throughout his career, Brad Pitt's been known for his hot bod (remember those abs from "Fight Club") and his chiseled good looks. But along the way, his ever-evolving hairdos also made women swoon. One of the best showcases for those lovely locks was in "Legends of the Fall," in which Pitt played Tristian Ludlow, a sensitive cowboy who fell for his brother's fiancée. So in honor of "Legends'" 20