Usher, Diddy, and Jessica Simpson are among the celebrity designers who will be ringing in the holiday season in a new Macy’s television ad campaign (Similar to the one featured above). Martha Stewart, Russell Simmons, Tommy Hilfiger, and Donald Trump will as make appearances to promote their perfumes, colognes, clothing, tableware-all on sale at Macy’s. In the ad campaign, the celebs help decorate the store when a usually ditzy Jessica Simpson accidentally pulls the plug on the Christmas lights.