The event Social_event featured 3 stages with 60 bands , including Jackson Browne , Train , The Black Crowes , Zac Brown Band , The Shins , Primus , The Avett Brothers , Joan Jett , Cake , Jane 's Addiction , The Flaming Lighting Lips , Kings of Leon , The Black Keys , Alabama Shakes , The Iron Heart , Ben Harper and Charlie Musselwhite .

The headliner in 2015 was Alabama Shakes .

The festival has hosted more than 200 performing artists including Ben Harper & The Innocent Criminals , Alabama Shakes , Cage The Elephant , Sheryl Crow , Passion Pit , Portugal .