Karl Lagerfeld once created a Walmart-sized "Chanel Shopping Center" to show off his ready-to-wear collection. It featured aisle upon aisle of luxury foods labeled "one for the price of two." Immediately after models had paraded through the aisles, guests raided the shelves. Rihanna posed in a shopping cart, and Keira Knightley looked on amazed. "Luxury should be worn like you're going to the supermarket. It's the pop art of the 21st century," Lagerfeld said, his eyes barely visible behind his enigmatic shades. The show was the type of presentation that came to define much of Lagerfeld's six-decade career at the top of fashion.