First lady Michelle Obama topped the 2010 Forbes' Most Powerful Women list. According to Forbes, the annual list is "based less on traditional calculations of wealth and executive position, and more on creative influence and entrepreneurship."
Actress and talk show host Ellen DeGeneres ranked 10th on the 2010 Forbes' List of Most Powerful Women. Here she is seen at the unveiling of the US Postal Service Animal Rescue: Adopt a Shelter Pet Stamps in Los Angeles on April 30, 2010.
Talk show host and author Chelsea Handler came in at number 33 on the this year's Forbes' List of Most Powerful Women. In this photo, she arrives at the 2009 Women In Film Crystal and Lucy Awards on June 12, 2009 in Century City, Calif.
Pop star Lady Gaga is listed at number seven on the 2010 Forbes' List of Most Powerful Women. Here, the "Poker Face" singer is seen in the press room during the 2010 MTV Video Music Awards, Sept. 12, 2010, in Los Angeles.
Stephenie Meyer, author of the hit "Twilight" series, was ranked 49 on the Forbes' Most Powerful Women of this year. Here she is seen at the premiere of "The Twilight Saga: Eclipse" at the Nokia Theater in Los Angeles, June 24. 2010.
Supreme Court Justice Ruth Bader Ginsburg poses during a group photograph at the Supreme Court building on Sept. 29, 2009, in Washington. She came in at number 31 on the Forbes 2010 List of Most Powerful Women.
Talk show host Rachel Maddow made this year's Forbes' Most Powerful Women list at number 50. Here she is seen at the 2009 Winter Television Critics Association Press Tour on Jan. 15, 2009, in Los Angeles.
Actress and fashion designer Sarah Jessica Parker attends the Burberry Prorsum Spring/Summer 2011 fashion show during London Fashion Week, Sept. 21, 2010, in London. The former "Sex and the City" star was recognized on the 2010 Forbes' List of Most Powerful Women at 45.
The Supreme Court's newest Justice Elena Kagan smiles after being sworn in by Chief Justice John Roberts at the Supreme Court Building, Aug.7, 2010, in Washington. She is listed as number 25 on the 2010 Forbes' List of Most Powerful Women.
Tennis star Serena Williams, ranked at number 55 on the Forbes' list of Most Powerful Women, attends "Fashion's Night Out: The Show" at Lincoln Center in New York, Sept. 7, 2010. Her older sister, Venus Williams, also made this years list, coming in at number 60.
Supermodel and "Project Runway" host Heidi Klum takes her spot on the Forbes' List of Most Powerful Women this year at number 39. Here she is seen walking the catwalk during the Victoria's Secret Fashion Show, Nov. 19, 2009, in New York.
Gisele Bundchen is the second supermodel to make it on this year's Forbes' Most Powerful Women list. The Brazilian beauty is also ranked number 1 on Forbes' list of the world's highest paid models for 2010.
Madonna performs at "Hope for Haiti Now: A Global Benefit for Earthquake Relief", on Friday, Jan. 22, 2010, in New York. The singer and fashion designer ranked number 29 on the 2010 Forbes' List of Most Powerful Women.
Talk show host and author Rachael Ray ranked at number 78 on this year's Forbes' Most Powerful Women list. Here she is seen walking the redcarpet at the US Weekly's 25 Most Stylish New Yorkers event on Sept. 15, 2010, in New York.
Lifestyle guru and talk show host Martha Stewart earned her spot on the 2010 Forbes' List of Most Powerful Women at number 99. Here she attends the Showtime screening of "The Big C" at the private home of Donna Karan on Aug. 7, 2010, in East Hampton, New York.