Some of the well-known festival headline acts Action over the years include Cause_to_be_included Riley Lee , Afenginn , My Friend the Chocolate Cake , Stiff Gins , Zulya Kamalova , Rory McLeod and Frank Yamma .

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 .