Forbes has released this year’s 100 Most Powerful Celebrities list with Oprah Winfrey, as usual, topping the list.  But the biggest shocker in the list is breakout artist Lady Gaga who makes the list’s and cements her status as the fourth most powerful celebrity in the world.

Beyonce took the second spot while Oscar winning director James Cameron nabbed the third spot, and Tiger Woods, who despite his highly publicized marital issues, completes the top five of the list.  Britney Spears, U2, Sandra Bullock, Johnny Depp and Madonna also make the cut to complete the list’s top 10.

Also named as one the of the most powerful celebs are Twilight’s Robert Pattinson, Kirsten Stewart and author Stephanie Meyer, singers Lil Wayne, The Black Eyed Peas and Akon, late night hosts Conan O’Brien and Chelsea Handler, Kate Hudson, Robert Downey Jr., and today’s highest paid footballer and new baby daddy Cristiano Ronaldo.

The Forbes list is based basically three categories: the media personality’s earnings over the past 12 months, their amount of exposure to the various medium of entertainment such as TV, radio, print and lastly, and this one’s the latest addition to the criteria, amount of online exposure especially among social network sites such as Facebook and Twitter.

Meanwhile, Time Magazine has also released a list of the “Top Celebrity Do-Gooders”, naming the celebrities who are often seen doing charitable activities such as (in random order) Brad Pitt, Angelina Jolie, Oprah Winfrey, Bono, Elton John, George Clooney, the late Danny Thomas and Paul Newman, Jerry Lewis and young actress Hayden Panitierre who makes the list for her effort in saving endangered whales.