6 of 50
6. Oprah Winfrey
6. Oprah Winfrey
2008 rank: 8
Age: 55

She's still got the magic touch: When Oprah praised the Kindle, it sold out before Christmas. She's on track to launch OWN, her cable network, to 70 million viewers next year, but ratings for her show are down 31% since 2004.

NEXT: 7. Ellen Kullman
Last updated September 15 2009: 12:58 PM ET
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