Who is she? She's the godmother of American chat shows and was America's first black female billionaire.
How did she make her millions? Originally a news anchor, Winfrey began hosting AM Chicago in the early '80s, and made it her own. Renamed The Oprah Winfrey Show, it grossed $125 million in its first year of US syndication.
Winfrey took $30 million and, through her Harpo company, won control of the show. She also owns O: The Oprah Magazine (circulation 2.7 million) and holds stakes in other media companies, including Viacom.