VIDEO Spanx inventor Sara Blakely's best advice for female

She believes everyone starting a business should ask herself one important question.

Spanx Founder Sara Blakely on family, mentoring and keeping the competition 'behind' her - Tampa Bay Business Journal

Sara Blakely - Variety's Power of Women Full Speech

SPANX Founder Sara Blakely's Story: From Door-to-Door Sales to Billion-Dollar Company

Sara Blakely: Five lessons in smarter thinking

Female founders are crashing the billionaire club: Sara Blakely

Billionaire Sara Blakely Of Spanx Top 5 Biz Tips

How Sara Blakely Built Spanx

Video) Sara Blakely Shows Us How She Went From $5,000 to $1Billion To Be The Youngest Female Billionaire - Addicted 2 Success

Spanx Founder Sara Blakely Pens Tribute to 'Idol' Olivia Newton-John

Advice from Married Entrepreneurs Sara Blakely and Jesse Itzler

Spanx founder Sara Blakely's advice for female entrepreneurs