Best friends Hilton (left) and Nicole Richie may look chummy here during an interview to promote their television show, "The Simple Life," but their 2005 fight almost broke the pair up for good. They filmed the fourth season, "The Simple Life 4: 'Til Death Do Us Part" separately, and in 2006 the unstoppable duo made up just in time for the fifth season of the series, "The Simple Life Goes To Camp."