OPRAH Winfrey has been named the world’s most powerful celebrity.This year, Oprah Winfrey is back atop the list for the fourth time.The TV star — who fronts The Oprah Winfrey Show and is the president of media company Harpo Productions — has topped the annual Most Powerful Celebrity poll conducted by Forbes magazine, knocking Angelina Jolie off the top spot with earnings of $315 million last year.Winfrey was followed by singer Beyonce Knowles, "Avatar" director James Cameron, newcomer Lady Gaga and disgraced golfer Tiger Woods.The Forbes Most Powerful Celebrity list looks at wealth, TV/radio popularity, press rank, web rank and social status — with even Twitter followers being taken into consideration.The 2010 poll placed Twilight star Robert Pattinson on the list for the first time, in 50th position following the success of the vampire movies, and after earning $17 million last year.Despite a tumultuous year in her personal life, Oscar-winning actress Sandra Bullock was placed eighth in the poll after pocketing $56 million in the past 12 months. She was just behind golfer Tiger Woods, who was placed fifth, Britney Spears, sixth, and rock band U2 — consisting of Bono, The Edge, Adam Clayton and Larry Mullen Jr. — who were placed seventh.
