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Oprah Winfrey

Oprah Winfrey may have recently fallen off the diet train after confessing that she's 200 pounds, but at one time the media queen was in love with the Kathy Freston Quantum Wellness Cleanse. The 21-day vegan diet includes having three meals and two snacks a day, such as fruit parfaits and... Photo by Katy Winn/Getty Images