PETA has a new target. Well, two targets: Mary-Kate and Ashley Olsen. In a new ad campaign to be unveiled today at the Olsens' Walk of Fame star on Hollywood Boulevard, PETA blasts the 21-year-old star sibs — whom they dub the "Trollsen Twins — for wearing fur and including it in their collections Elizabeth and James and The Row. "Thin-twins Mary-Kate and Ashley Olsen are about to get some publicity that will have them running away faster than if they'd spotted a calorie," the group said in a snarky statement today. The new ad features the twins under the headline "Fur Is Worn by Beautiful Animals and Ugly People." To coincide with the ad, PETA has also launched a new web site devoted to "Hairy-Kate" and "Trashley." It features, among other things, a mash-up video called "Full House of Horrors," in which footage from the twins' former hit TV show is interspersed with – you guessed it – scenes of animals being killed for fur. "No one would argue that Mary-Kate and Ashley could use some meat on their bones, but the last thing they need is hair on their backs," PETA's Assistant Director of Youth Campaigns Dan Shannon said in a statement.