Kimora Lee Simmons really knows how to make a statement. The former Mrs. Russell Simmons and hip-hop fashion empress turned reality TV starlet is going au naturel for a new ad campaign for PETA (People for the Ethical Treatment of Animals). In the ad, titled Be an Angel for Dogs, the statuesque St. Louis native wears nothing but a stunning pair of angel wings while holding her dog, Zoe, to illustrate her naked desire to get people to make dogs a part of their families-and not leave them tied up outside or cooped up at home alone all day. "You cannot just chain up an animal," Simmons said. "The chains are heavy, it's cruel. Dogs need to run and play."