Veteran psychedelic rock group Iron Butterfly takes the stage at the Middle Tennessee Rock Festival and lays into a set of their mind-blowing hits, including "Easy Rider" and their signature tune, "In-A-Gadda-Da-Vida." The boys also treat their loyal fans at the outdoor classic rock extravaganza to lively renditions of "Butterfly Bleu," "Beyond the Milky Way," "Iron Butterfly Theme" and "Unconscious Power."