- John Adams – assistant
- Walter Afanasieff – arranger, composer, producer, programming
- Josh Alexander – composer, digital editing, engineer, producer, programming
- Dave Arch – string arrangements
- Dallas Austin – producer
- Matt Beckley – producer
- Haydn Bendall – string engineer
- Tom Bender – assistant, mixing assistant
- Louis Biancaniello – composer, engineer, mixing, producer, programming
- Chris Brooke – vocal engineer
- David Channing – engineer
- Lloyd Cooper – assistant
- Simon Cowell – composer, executive producer
- Clive Davis – executive producer
- Rich Davis – production coordination
- Craig Durrance – engineer
- Jörgen Elofsson – composer
- Mikkel Storleer Eriksen – composer, engineer
- Geoff Foster – string arrangements
- Chris Garcia – digital editing, engineer
- Serban Ghenea – mixing
- Tyler Gordon – digital editing, programming
- Aniela Gottwald – assistant
- Lukasz "Dr. Luke" Gottwald – composer
- Tatiana Gottwald – engineer
- Keith Gretlein – engineer
- Mick Guzauski – mixing
- Janne Hansson – engineer
|
- Tor Erik Hermansen – composer
- Nate Hertweck – assistant
- Chris Holmes – engineer
- Eddie Horst – string arrangements
- Josh Houghkirk – assistant
- Eric Hudson – composer, producer
- James Ingram – assistant
- Brett James – composer
- Jaycen Joshua – mixing
- Rouble Kapoor – engineer
- Nik Karpen – assistant
- David Krueger – composer
- Chris Laws – digital editing, editing, engineer
- Leona Lewis – composer
- Chris Lord-Alge – mixing
- Carlton Lynn – engineer, mixing
- Steve Mac – arranger, producer
- Ewan MacColl – composer
- Per Magnusson – composer
- Michael Mani – composer
- Andrea Martin – composer
- Max Martin – composer
- Jesse McCartney – composer
- Doug McKean – engineer
- Vlado Meller – mastering
- Greg Ogan – engineer
- Jordan Omley – composer
- Richard Page – composer
- Leon Pendarvis – string arrangements, string conductor
- Dave Pensado – mixing
|
- Trent Privat – assistant
- Daniel Pursey – engineer
- Tony Reyes – composer
- Tim Roberts – assistant
- Scott Roewe – digital editing
- J.R. Rotem – arranger, composer, producer
- The Runaways – composer
- Wesley Seidman – engineer
- Robert Smith – engineer
- Shaffer "Ne-Yo" Smith – composer
- Chris Soper – engineer
- Billy Steinberg – composer, producer
- Alonzo "Novel" Stevenson – composer, producer, programming
- Tim Sturges – assistant, assistant engineer
- Ren Swan – engineer, mixing
- Tom Syrowski – engineer
- Phil Tan – mixing
- Ryan Tedder – composer
- Aliaune "Akon" Thiam – producer
- Giorgio Tuinfort – producer
- Seth Waldmann – engineer
- Sam Watters – composer, engineer, mixing, producer, vocal producer
- Josh Wilbur – engineer
- Wayne Wilkins – composer, engineer, mixing, producer, programming
- Steven Wolf – producer
- Nina Woodford – composer
- Emily Wright – engineer, production coordination
|