From the evening wear competition, to swimsuits to naked! Four former Miss USA Pageant Winners are dropping their clothes, crowns and sashes for PETA! Susie Castillo, Shandi Finnessey, Shanna Moakler and Alyssa Campanella are baring it all in an effort to urge the pageant industry to do away with fur! With the 2013 Miss USA Pageant going down in Las Vegas this weekend, the new sexy and informative ad couldn't have come at a better time! Well spoken, ladies- and did we mention how hot they look for a good cause?!