Sara Blakely is a 45-year-old worth $1 billion. She founded the company Spanx, which makes intimate apparel, pants, and leggings. Time named her as one of the most 100 influential people in the world in 2012. Forbes has named her the 93rd most powerful woman in the world. With there being millions of people in the world, being the 93rd most powerful is amazing. The next billionaire is one of the youngest in the world.