She's a mother and a musician, but Grigorieva is best known for her role in perhaps the ugliest phone conversation in history. Tapes of ex-lover Mel Gibson spewing bizarre vulgarities at her were released online, to the dismay of all.
For connecting more than half a billion people and mapping the social relations among them, for creating a new system of exchanging information and for changing how we live our lives, Mark Elliot Zuckerberg is TIME's 2010 Person of the Year