Spanx founder Sara Blakely speaks onstage during the Massachusetts News Photo - Getty Images

Spanx founder Sara Blakely speaks onstage during the Massachusetts Conference for Women at Boston Convention & Exhibition Center on December 8, 2016 in Boston, Massachusetts. Get premium, high resolution news photos at Getty Images

1,101 Sara Blakeley Photos & High Res Pictures - Getty Images

Photos: Spanx founder Sara Blakely through the years

1,101 Sara Blakeley Photos & High Res Pictures - Getty Images

1,101 Sarah Blakely Photos & High Res Pictures - Getty Images

Photos: Spanx founder Sara Blakely through the years

Spanx founder Sara Blakely, Gayle King and WCVB-TV Director of Public News Photo - Getty Images

Sara Blakely - Wikipedia

1,154 Gayle O Stock Photos, High-Res Pictures, and Images - Getty Images

1,101 Sarah Blakely Photos & High Res Pictures - Getty Images

Photos: Spanx founder Sara Blakely through the years – KIRO 7 News Seattle

Photos: Spanx founder Sara Blakely through the years

1,101 Sara Blakeley Photos & High Res Pictures - Getty Images

Spanx founder Sarah Blakely rewards workers with $10,000 and first-class plane tickets - CBS News