Forbes has released this year's Celebrity 100, the list of the world's most powerful celebrities and Oprah Winfrey reigns supreme in the No. 1 position. With her estimated $260 million annual earnings, not to mention her ubiquitous presence on the Internet, in the press and on TV and radio, Oprah has knocked pal Tom Cruise from the top slot. (Tom came up, uh, short at No. 8.) Others in the top 10 are Tiger Woods, Madonna, The Rolling Stones, Brad Pitt, Johnny Depp, Elton John, Jay-Z and Steven Spielberg.