San Francisco - Delivery Agent, a provider of "shopping-enabled programming" that lets TV viewers purchase products used or endorsed by celebrities, on Monday announced a partnership with recording artist and actress Jessica Simpson. More than 500 products will be featured on a Simpson-branded page at SeenOn.com. "Fans will be able to emulate Simpson, one of this decade's most sought after style icons, by purchasing products from all aspects of her celebrity lifestyle, including apparel, accessories and her upcoming fragrance line," the company said.