Another Planet Entertainment, Superfly Presents and Starr Hill Presents, in a partnership with the San Francisco Recreation and Park Department, are proud to announce the lineup for the fourth annual Outside Lands Music & Arts Festival.

Lineup includes Muse, Phish, Arcade Fire, The Black Keys, MGMT, The Decemberists, Erykah Badu, the Warren Haynes Band, Deadmau5. The festival will once again take place in San Francisco's historic Golden Gate Park August 12 - 14, 2011.