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 .