5 revelations from an updated 'Kardashian Confidential'

5 reveals from the sisters' tell-all book

2. Kourtney took acting classes and hated it

Peter Kramer/HONS/AP/NBC

"I would get so nervous and embarrassed in front of the class that I would pretend to be sick almost every day," wrote Kourtney, who was a theater arts major at Southern Methodist University in Dallas. "Improv was just terrifying. I know it's ironic, because now I'm on camera constantly for the shows and I couldn't care less!"

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