Joe London – engineer, production, programming Dr. Luke – production, programming Harvey Mason, Jr. – vocal production Tim McClain – assistant Victoria Monét – vocal production Cameron Montgomery – assistant Mikkel S. Eriksen – engineer Stargate – production Tommy Parker – vocal production Taylor Parks – vocal production T-Collar – production, engineer J.R. Rotem – production Ricky Reed – engineer, production, programming Benjamin Rice – engineer Irene Richter – production coordination Deon Sanders – production Travis Sayles – production Christopher Trujillo – engineer Miles Walker – engineer Brandon Wood – assistant Daniel Zaidenstadt – engineer Musicians Julian Bunetta – musician Tor Erik Hermansen – instrumentation Cirkut – instrumentation Dr. Luke – instrumentation Mikkel S. Eriksen – instrumentation Jonas Jeberg – instrumentation Darhyl "DJ" Camper, Jr. – keyboards Kyle Townsend – piano Ori Kaplan – saxophone Daniel Kyriakides – horn Charts Weekly charts Year-end charts Certifications Release history References 2015 debut albums Fifth Harmony albums Epic Records albums Albums produced by Harvey Mason Jr. Albums produced by Stargate Albums produced by Dr. Luke Albums produced by Cirkut Albums produced by J. R. Rotem