Other acts scheduled to appear include '90s trip-hop pioneers Massive Attack, TV on the Radio, Banks, Washed Out and emerging electronic music producer, XXYYXX.

Treasure Island is yet another stop on Outkast's grand tour of festivals � over 40 in all in 2014, plus a homecoming set in Atlanta. Treasure Island is relatively new in the world of American music festivals, launching in 2007. The event is held on the actual Treasure Island, which is located in the San Francisco Bay.