• Reuters, Monday, April 12, 2010 11:41 PM

Celebrity biographer Kitty Kelley says talk show host Oprah Winfrey spends so much energy on her career that the world's most powerful woman in media and business has nothing leftover for her personal life. "Oprah has immense drive, a really insatiable drive. She never stops working and her career and her empire is the first priority in her life," she said.

Kelley's new book, "Oprah: A Biography," just hit U.S. book stores and disappointed some media watchers who hoped it might end years of speculation that Winfrey may be gay and answer questions about her relationships with fiancee Stedman Graham. Contrary to the "warm, embracing, uninhibited, spontaneous woman," cultivated on her talk show, a behind-the-scenes look tells a different story of Winfrey's personality, she said. "Off camera she is much more reserved, very, very aloof, she can be icy cold, and she now sees herself as a brand really," Kelley said. "And that is different from seeing herself as a person or even as a celebrity."

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