Producer: HARV - Artist: Justin Bieber - Featuring: Ludacris - Producer: Shndo - Vocal Engineer: Josh Gudwin - Featuring: Usher - Vocal Engineer: Andrew Watt - Featuring: Snoop Dogg - Asst. Recording Engineer: Ryan Lytle - Mixer: Josh Gudwin - Assistant Mixer: Heidi Wang - Guitar: HARV - Bass: HARV - Keyboards: HARV - Piano: HARV - Performer: Justin Bieber - Mastering Engineer: Colin Leonard - Vocal Producer: Josh Gudwin - Vocal Producer: Andrew Watt - Vocal Engineer: Gerald "The Sound" Keys Jr. - Vocal Engineer: Ben "Bengineer" Chang - Additional Engineer: Ray Charles Brown Jr. - Asst. Recording Engineer: Robert N. Johnson