Spanx founder, Sara Blakely, is the world's youngest self-made female billionaire

Forbes tally grows to 1,226 billionaires globally

Business tips from a billionaire

Business tips from a billionaire

Business tips from a billionaire

Business tips from a billionaire

Spanx founder, Sara Blakely, is the world's youngest self-made female billionaire

Business tips from a billionaire

Business tips from a billionaire

Hmmmm--Spanx and the youngest self-made billionaire