Bonaroo has added more names to its 2010 festival line up, with names like Ween, Galactic, Umphrey's McGee, John Butler Trio, The Gossip, and Circa Survive. Check out a complete line up in the Spacelab Festival Guide.

Tickets are on sale now.

In a few short years, Bonnaroo has quickly become one the U.S.'s biggest and best festivals. Set on a 700 acre farm in Manchester, Tennessee, it's the playground of the cool kids and the hippies, at the same time, on the same field.

Bonnaroo happens on June 11th - 14th in Manchester in Coffee County, Tennessee.

Check out the Spacelab Festival Guide for more information on Bonnaroo.