All aspiring billionaires should study the business case of Sara Blakely and her product, Spanx. She's one of the best examples of using necessity
How hating pantyhose in summer helped make Spanx founder Sara
6 Lessons D2C Businesses Can Learn From Spanx - Velocity
From $5,000 to $1.2 billion: Spanx lands investment deal with
From Beyoncé To Sara Blakely: Nine Pieces Of Advice From Today's Wealthiest Women
Blackstone buys majority stake in Spanx, valuing it at $1.2 bln
Spanx founder gifts employees 2 1st-class plane tickets, $10,000
Sara Blakely Net Worth
Oprah, Reese Witherspoon Invest in Spanx at $1.2 Billion Valuation
Spanx founder gives employees $10,000, 2 first-class plane tickets