Lily Allen has experienced first-hand just how tough a foray in fashion can be: her Lexington Street boutique Lucy In Disguise closed its doors in January. The brand launched in 2011 in conjunction with 29-year-old Lily's sister Sarah Owen, and the siblings maintain that online sales are strong.
Paris (33) has made tens of millions in a decade-long career as a socialite but fans in this part of the world may be less familiar with the chain of Paris Hilton Handbags & Accessories stores. Close to 50 outlets bear her name in such countries as Jordan, Egypt, Qatar and Saudi Arabia.
The reality TV star may only be 24, but she's built an impressive empire around eyelashes, fake tan, fitness DVDs, perfume and fashion. She opened her first boutique in her native Essex two years ago, which sells clothing and beachwear and jewellery
Mary-Kate and Ashley Olsen
Since leaving behind acting, the 28-year-old former child-stars have become fashion industry favourites. In May, the twins opened their first boutique in LA - a fixed home for their successful high-end brand The Row.