SPANX Founder Sara Blakely on Joining 'Shark Tank': 'I Was Flooded

ET got a behind-the-scenes sneak peek at Blakely's guest-starring role. 

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

Shark Tank Guest Sara Blakely of Spanx Wears Dress Backwards on TV

Sara Blakely's First EVER Shark Tank Deal, Shark Tank Firsts

Spanx Billionaire Sara Blakely's Tip for Single Women at Thanksgiving

Meet Sara Blakely, Shark Tank US

Spanx Billionaire Sara Blakely Trades Lawsuits As Reality TV Star Threatens Patent 'War

Sara Blakely on LinkedIn: #mondaymotivation #mondaymugshot #business #entrepreneur

Sara Blakely

Watch: Spanx Employees React to Gift of $10,000, Plane Tickets