- William Adams – composer
- Mykael Alexander – assistant
- J. Baptiste – composer
- Beardyman – vocals
- Jessie Bonds – guitar
- Jay Brown – A&R
- Bobby Campbell – assistant
- Chase & Status – producer, musician
- Chew Fu – Programming, Remix Producer, Remixing
- James J. Cooper III – celli, soloist
- Cédric Culnaërt – assistant engineer
- Tyler Van Dalen – assistant engineer
- Kevin "KD" Davis – mixing
- Ester Dean – composer
- Steven Dennis – assistant engineer
- Dylan Dresdow – mixing
- Mikkel S. Eriksen – composer, engineer, vocal producer, musician
- James Fauntleroy II – composer
- James Fauntleroy – vocals (background)
- Glenn Fischbach – celli
- Paul Foley – engineer
- Rick Friedrich – assistant engineer
- Future Cut – keyboards
- Mariel Haenn – stylist
- Alex Haldi – design
- Kevin Hanson – assistant
- Chuck Harmony – producer
- Keith Harris – strings
- Ben Harrison – guitar, additional production
- Karl Heilbron – vocal engineer
- Simon Henwood – art direction, design, photography, stylist
- Tor Erik Hermansen – composer, musician
- Jean-Marie Horvat – mixing
- Ghazi Hourani – mixing assistant
- Jaycen Joshua – mixing
- Jay Jenkins – composer
- Mike Johnson – engineer
- JP Robinson – art direction, design, photography
- William Kennard – composer
- B. Kennedy – composer
- Brian Kennedy – keyboards, programming, producer
- Padraic Kerin – engineer
- Olga Konopelsky – violin
- Emma Kummrow – violin
- Giancarlo Lino – mixing assistant
- Pater Martinez – assistant
- Luigi Mazzocchi – violin, soloist
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- M. McHenry – composer
- Monte Neuble – keyboards
- Terius Nash – composer, producer
- Luis Navarro – assistant engineer
- Shaffer Smith – composer, producer
- Jared Newcomb – mixing assistant
- Peter Nocella – viola
- Chris "Tek" O'Ryan – engineer
- Anthony Palazzole – mixing assistant
- Paper-Boy – additional production
- Ciarra Pardo – art direction, design
- Charles Parker – violin
- Ross "Dights" Parkin – assistant engineer
- Daniel Parry – assistant
- Kevin Porter – assistant
- Antonio Reid – executive producer
- Antonio Resendiz – assistant
- Makeba Riddick – composer, vocals (background), vocal producer
- Rihanna – executive producer, art direction, design
- Montez Roberts – assistant engineer
- Evan Rogers – executive producer
- Sébastien Salis – assistant engineer
- Jason Sherwood – assistant engineer
- Tyran "Ty Ty" Smith – A&R
- Caleb Speir – bass
- Stargate – producer
- Status – producer
- Xavier Stephenson – assistant
- Christopher "Tricky" Stewart – producer, composer
- Tim Stewart – guitar
- Bernt Rune – stray guitar
- Carl Styrken – executive producer
- Rob Swire – composer, musician
- Igor Szwec – violin
- R. Tadross – composer
- Sean Tallman – engineer
- Marcos Taylor – engineer
- Gregory Teperman – violin
- Brian "B-Luv" Thomas – engineer
- Pat Thrall – engineer
- Justin Timberlake – composer
- Marcos Tovar – engineer
- Neil Tucker – assistant, guitar engineer
- Ellen Von Unwerth – photography
- Alain Whyte – guitar (acoustic)
- Andrew Wuepper – engineer
- Ys – producer
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