Belle Gibson convinced the world she had healed herself of terminal brain cancer by eating a healthy diet. She built a global business based on her story. There was just one problem: she never had cancer in the first place. In 2015, journalists uncovered the truth behind Gibson's lies. This hero of the wellness world, with over 200,000 followers, international book deals, and a best-selling mobile app, was a fraud. She had lied about having cancer...