Nothing is more iconic than the red Louboutin sole. A staple on the well-heeled everywhere, most people don't know that the inspiration for the red sole actually came from women's nail polish. The French designer had the idea to paint the bottom of his shoes red while mocking up his very first prototype beside his assistant—who was painting her nails in the bright shade. That was over two-decades ago. Now, for the first time ever Christian Louboutin is stepping into the beauty arena with a line of polishes. And where better to start than with the blood red hue that made his shoes an object of desire for women everywhere?