ZPZG "Go Crazy" MV Released By Charmaine | Sponsored Insight Sep 26, 2014 ZPZG with 4 members (Kahn, Kang, Gyum, and Jihoon) make their debut with the single "Go Crazy" and the MV was released last Sept.25,2014 The song describes a guy who's crazy for a girl that he met for the first time.