- The Ambassadors – keyboards
- Marcella "Ms. Lago" Araica – mixing
- Chris Athens – mastering
- Johntá Austin – vocal production
- Tim Blacksmith – management
- Adam Blackstone – music
- B.M.C. – bass, strings, drums, keyboards, programming, editing
- G. Preston Boebel – engineering
- Kobie Brown – music clearance
- Míguel Bustamante – mixing assistance
- Candice Childress – production coordination
- Brian Michael Cox – arrangement, production
- Danny D – management
- Vidal Davis – production, instrumentation
- Vincent Dilorenzo – engineering, mixing
- Dylan Dresdow – mixing
- Assa Drori – violin
- Jermaine Dupri – production, mixing
- Mattias Eng – music clearance
- Mikkel S. Eriksen – engineering, instrumentation, grand piano
- Donald Ferrone – double bass
- Brent Fischer – conductor, string arrangements
- Clare Fischer – string arrangements
- Armen Garabedian – principal
- Brian Gately – production coordination
- Serban Ghenea – mixing
- Mark Gray – engineering assistant
- Ryan Greene – engineering
- Donato Guadagnoli – music clearance
- John Hanes – digital editing
- Kuk Harrell – production, engineering, vocal production
- Andre Harris – production, instrumentation
- Vahe Hayrikyan – cello
- Karl Heilbron – guitar, engineering
- Tor Erik Hermansen – instrumentation
- Chris Hicks – author, management
- Leticia Hilliard – artist coordination
- Ray Holton – guitar
- John Horesco IV – engineering
- Josh Houghkirk – mixing assistance, assistance
- Dave Hyman – engineering
- Jay-Z – vocals
- Jazze Pha – production
- Padraic Kerin – engineering
- Beyoncé Knowles – vocals
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- James Lackey – production
- Lyah Beth LeFlore – liner notes
- Lil Wayne – vocals
- Espen Lind – guitar
- Craig Love – guitar, production
- Manny Marroquin – mixing
- Derrick "Young World" McAlister – keyboards
- Carlos "Los Da Mystro" McKinney – production
- Benny Medina – author, management
- Tadd Mingo – engineering assistance
- Scott Naughton – engineering
- Ne-Yo – production
- Alec Newell – engineering
- Greg Ogan – engineering
- Carlos Oyanedel – mixing assistance
- Anthony Palazzole – mixing assistance
- Joe Peluso – engineering assistance, mixing assistance
- Dave Pensado – mixing
- Kazi Pitelka – viola
- Mark Pitts – executive production, author, A&R
- Christian Plata – mixing assistance
- Polow da Don – production, instrumentation
- Tameka Raymond – stylist
- Usher – vocals, executive production
- Geoff Rice – engineering assistance
- Tim Roberts – Pro-Tools
- J.R. Rotem – arrangement, production, instrumentation
- Norman Jean Roy – photography
- Brian Schunck – mixing assistance
- Manuel Seal – guitar, production
- Harry Shirinian – viola
- Cory Shoemaker – engineering assistance
- S.O.S. Horn Players – horn
- Soundz – production
- Brian Springer – engineering
- Brian Stanley – engineering, mixing
- Christopher "Tricky" Stewart – production
- Phil Tan – mixing
- Tony Terrebonne – engineering
- Sam Thomas – engineering
- Pat Thrall – engineering
- Andrew Weupper – mixing assistance
- will.i.am – synthesizer, production, engineering, Fender Rhodes, drum programming, vocals
- Corey Williams – engineering
- Andrew Wuepper – mixing assistance
- Young Jeezy – vocals
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