SPANX Founder Sara Blakely on Joining 'Shark Tank': 'I Was Flooded With Emotion' (Exclusive)

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

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Sara Blakely

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SPANX Founder Sara Blakely on Joining 'Shark Tank': 'I Was Flooded With Emotion' (Exclusive)

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