Jessica Simpson is getting her little sister, Ashlee, in on the fashion business. As Jess, whose fashion empire is worth a whopping $1 billion, expands into the tween and teen market this year, she'll have Ashlee come on as co-creative director, according to E! Online. "I'm excited to bring my sister ... to this division, because she brings a savvy rocker edge that defines today's tweens," Jess tells WWD. Adds Ashlee, "My goal ... will be to design clothes that will help inspire young girls to express their personalities and creativity through fashion." Hey, whatever keeps her off TV.