NEW YORK: Flamboyant pop singer Lady Gaga ousted US media mogul Oprah Winfrey to top this year's Forbes celebrity power list released, Wednesday. Gaga moved up four positions from last year to claim the top spot in Forbes' annual “The Celebrity 100” 2011 list. Forbes estimated her earnings in the past 12 months as $90 million, but also noting her 32 million Facebook fans and 10 million Twitter followers. Winfrey, who next week ends “The Oprah Winfrey Show” after 25 years, dropped one place from last year to No. 2 earning an estimated $290 million. Canadian pop star Justin Bieber, 17, was the youngest to make the list and debuted at No. 3, earning $53 million from concerts and sales from his concert movie and documentary “Never Say Never.” Coming in at No. 4 was U2, earning $195 million and Elton John, who earned $100 million. Rounding out the top ten for 2011 was golfer Tiger Woods, earning $75 million, country singer Taylor Swift, rock band Bon Jovi, British music producer and “The X Factor” judge Simon Cowell and US basketball player LeBron James. Other big newcomers include singer Katy Perry at No 12, British director and producer Christopher Nolan at No. 47, actress Natalie Portman at No. 75.