After working as a freelance designer for a time, Louboutin set up his own shop in Paris in the early 1990s. He found the inspiration for his trademark red outer soles in 1993. "My assistant was sitting there, painting her nails red. I took one look and decided to color my soles red as a statement for the season," Louboutin told Footwear News. "I thought, 'Oh my god! Red soles are so flirtatious,' and my customers asked me not to stop." His artistic yet sexy shoes soon attracted the likes of Princess Caroline of Monaco, one of his early customers. Madonna wore his dangerously high heels in some of her videos, helping to introduce the world to Louboutin.