Oprah Winfrey becomes one of world's 500 richest people
American television host Oprah Winfrey has become the first black female entrepreneur on the Bloomberg Billionaires Index, a ranking of the world's 500 richest people. With a net worth of $4 billion, the 64-year-old media mogul has been ranked at 494. Most of her fortune comes from the ownership of The Oprah Winfrey Show, which ran for 25 years.