ET got a behind-the-scenes sneak peek at Blakely's guest-starring role.
Sara Blakely
Sara Blakely's First EVER Shark Tank Deal
Sara Blakely
Sara Blakely
Sara Blakely, Biography, Spanx, & Facts
Sara Blakely's First EVER Shark Tank Deal
Sara Blakely - How Spanx Got Into Neiman Marcus
SPANX Founder Sara Blakely on Overcoming Fear of Failure in
Spanx founder in talks to guest star on 'Shark Tank
Shark Tank Guest Sara Blakely of Spanx Wears Dress Backwards