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Forbes magazine's most powerful celebrity: Oprah

Oprah Winfrey attends a panel during the Oprah Winfrey Network (OWN) Television Critics Association winter press tour in Pasadena, California in this January 6, 2011 file photo. After two years as a runner-up, Oprah Winfrey was named the most powerful celebrity on June 26, 2013 by Forbes,... MARIO ANZUONI / REUTERS