Who is Sara Blakely? Get to know billionaire Spanx founder as she joins investors on Shark Tank

This week's Shark Tank sees Sara Blakely, the billionaire founder of Spanx, join the show as a guest investor. But did you know her amazing backstory?

Sara Blakely

Spanx names a new CEO

How Spanx Billionaire Sara Blakely Makes and Spends Her Fortune

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Sara Blakely: 7 Life Lessons from the Founder of SPANX

Sara Blakely - Eran Bucai

Guest 'Shark' and Spanx Founder Sara Blakely Says This Question Helped Her Become a Success

How Spanx CEO Sara Blakely Built a Billion Dollar Business

Sara Blakely

Sara Blakely

How Spanx CEO Sara Blakely Built a Billion Dollar Business

Sara Blakely: My inspiration was my own butt

How Spanx CEO Sara Blakely Built a Billion Dollar Business

How Spanx founder Sara Blakely makes and spends her $1.1 billion fortune

Spanx founder Sara Blakely gives staff $10,000, plane tickets - ABC News