Spanx, the Atlanta-based shape wear specialist, has appointed Jan Singer as its new chief executive. Singer joins from Nike, where he was corporate vice-president of global apparel and corporate vice-president of global footwear. Singer, who is expected to join the company in early July, will report to Sara Blakely, Spanx' founder and owner. Gregg Ribatt, the interim chief executive, will assist Singer through a transition, and then continue to serve on the company's board of advisors. Previously, Singer served as the vice president and general manager of Reebok's women's business and played key marketing and global communications roles for Chanel, Calvin Klein, and Prada. He also served as the beauty and fitness editor for YM Magazine. The Spanx brand houses more than 200 products ranging from slimming apparel and swimsuits, to bras, activewear and men's undershirts.