The world has a new richest man 2010, according to Forbes.

Mark Zuckerberg – $4 Billion

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Mark, 25, is the youngest billionaire in the world. He’s the face behind Facebook, and the undisputed champ of social networking. Speaking of which, he’ll be portrayed by Jesse Eisenberg in ‘The Social Network,’ due in theaters this fall.

Oprah Winfrey – $2.7 Billion

Oprah Winfrey

Oprah Winfrey

Oprah is arguably the most powerful person in entertainment. She turns authors into instant celebs, down home chefs into chain restauranteurs and doctors into blockbuster gurus. She’s turned us into believers, and you know we’ll tune in when the Oprah Winfrey Network launches later this year

Mikhail Prokhorov – $13.4 Billion

Mikhail Prokhorov

Mikhail Prokhorov

If this galavanting Russian industrialist isn’t quite a celebrity yet, he will be shortly. The 6’7″ 44-year-old recently bought a controlling stake in the NBA’s New Jersey (soon to be Brooklyn) Nets. He’s notoriously single — see his arrest on “pimping” charges in 2007, for which France recently apologized. Basically, he’s about to be the King of New York.