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 founder of Spanx Sara Blakely turned US$5,000 to US$1b
Blackstone Buying Majority Stake in Spanx - WSJ
Sara Blakely's Net Worth: Spanx Founder Regains Billionaire Status
What Is Sara Blakely's Net Worth?
Sara Blakely Sells Majority Of Spanx To Blackstone At $1.2 Billion Valuation
Oprah, Reese Witherspoon Invest in Spanx at $1.2 Billion Valuation
Who is Spanx CEO Sara Blakely and what is her net worth?
How Spanx CEO Sara Blakely Built a Billion Dollar Business
Sara Blakely Is A Billionaire (Again) After Selling A Majority Of
How Sara Blakely Went From Disney Goofy to Spanx Billionaire
Spanx Reshapes Itself - Atlanta Jewish Times