Celebrities are no longer just pretty faces. Left and right, our favorite actresses, singers, and models are joining the work force as successful businesswomen. These women, including Tyra Banks, Lauren Conrad, Nicole Richie, and Jessica Alba, not only have the beauty but they also have the brains to back it up. We've rounded up a list of our favorite stars who have entered into business enterprises and come out on top as a kick-ass entrepreneurial businesswoman.