With their electrifying, all-improvised sets, Whose Hat is This? are a group that embodies unhinged musical spontaneity. The collective of current and former Tedeschi Trucks Band members bassist Tim Lefebvre (David Bowie), saxophonist Kebbi Williams (Outkast), and drummers JJ Johnson (John Mayer) and Tyler "Falcon" Greenwell (Col. Bruce Hampton) seamlessly conjure up whirling music that combines elements of experimental jazz, funk, electronica, and just about everything in-between.