March 09, 2012 | By W.J. Hennigan, Los Angeles Times
Spanx inventor Sara Blakely is a billionaire at 41 years old, according to the annual Forbes magazine list of billionaires.
Blakely, the creator and owner of the line of women's and men's slimming, smoothing undergarments, is the youngest woman ever to make the list as a self-made billionaire, meaning she didn't inherit or marry into the money.