Bass, Guitar, Keyboards, Producer, Written-By – John ShanksContractor, Coordinator [Production Coordination] – Shari SutcliffeDrums – Vinnie ColaiutaEdited By [Pro-Tools] – Lars FoxEngineer [Assistant] – Keith Armstrong, Nik Karpen, Paul LaMalfaEngineer, Programmed By – Jeff RothschildKeyboards – Charles JudgeMixed By – Chris Lord-AlgeMixed By [Additional] – Andrew Schubert, Brad TownsendWritten-By – Danielle Brisebois, Leona Lewis

Backing Vocals [Additional] – Vicky SandströmEngineer [Additional] – Damien LewisGuitar [All] – Esbjörn OhrwallMixed By – Phil TanProducer, Recorded By – ArnthorWritten-By – Arnthor Birgisson, Max Martin, Savan Kotecha

Contractor, Coordinator [Production Coordination] – Shari SutcliffeDrums – Vinnie ColaiutaEdited By [Pro-Tools] – Lars FoxEngineer [Additional] – Alex Gibson Engineer [Assistant] – Keith Armstrong, Nik Karpen, Paul LaMalfaEngineer, Programmed By – Jeff RothschildGuitar, Keyboards, Producer, Written-By – John ShanksKeyboards – Charles JudgeMixed By – Chris Lord-AlgeMixed By [Additional] – Andrew Schubert, Brad TownsendProgrammed By – Dan ChaseWritten-By – Leona Lewis, A. "Novel" Stevenson

Arranged By [Choir] – Lawrence JohnsonArranged By [Strings] – Will MaloneBacking Vocals – Beverley Skeet, Sara-Jane SkeetBass – John GarrisonDrums – Karl BrazilEngineer – Richard FlackEngineer [Vocals] – Seth WaldmannGuitar – Luke PotashnickMixed By – Jeremy WheatleyPiano, Producer – Steve RobsonStrings – The London Session OrchestraWritten-By – Noel Gallagher

Edited By – Ron TaylorEngineer – John HanesEngineer [Assistant] – Tim RobertsInstruments, Producer – Kevin RudolfMixed By – Serban GheneaRecorded By – Joshua BerkmanWritten-By – J. Kasher, K. Rudolf

Bass, Drums, Engineer, Guitar, Producer, Written-By – Julian BunettaEngineer [Additional] – Damien LewisGuitar, Keyboards, Piano, Producer, Written-By – Andrew FramptonMixed By – Phil TanStrings – Christine WuWritten-By – Leona Lewis, Savan Kotecha

Edited By [Pro-Tools, Assistant] – Tim RobertsEdited By [Pro-Tools] – John HanesMixed By – Serban GheneaProducer, Written-By – Max Martin, Shellback Recorded By – Ann MincieliRecorded By [Assistant] – Christian BakerWritten-By – Savan Kotecha

Arranged By, Backing Vocals, Bass, Drum Programming, Instrumentation By [All Other], Producer, Synth, Written-By – Ryan TedderArranged By, Co-producer, Piano, Written-By – Dan MuckalaBass, Cello, Co-producer, Instrumentation By [All Other], Synth – Brent KutzleCo-producer, Drum Programming, Engineer – Noel ZancanellaDrums – Eddie Fisher Engineer [Additional] – Damien LewisFeaturing – OneRepublicMixed By – Phil TanWritten-By – Jess Cates, Leona Lewis, Lindy Robbins

Acoustic Guitar, Arranged By, Backing Vocals, Drums, Engineer, Piano, Producer, Programmed By, Written-By – Ryan TedderCello – Brent KutzleEngineer – Craig Durrance, Joe Zook, Noel ZancanellaEngineer [Additional] – Damien LewisEngineer [Assistant] – Chris Kasych, Nicolas Essig, Richard WoodcraftMixed By – Phil TanWritten-By – E. Kidd Bogart, Leona Lewis

Arranged By [Choir] – Lawrence JohnsonArranged By [Strings], Conductor – Stephen HusseyBacking Vocals [Additional] – Stephen SimmondsEngineer [Strings], Recorded By [Strings] – Rich CooperGuitar [All] – Esbjörn OhrwallLeader – Simon FischerMixed By – Manny MarroquinMixed By [Assistant] – Christian Plate, Erik MadridProducer – ArnthorRecorded By – Seth WaldmannRecorded By [Choir] – Neil TuckerStrings – Urban Soul OrchestraWritten-By – Arnthor Birgisson, Ina Wroldsen

Arranged By [Strings] – Larry GoldCo-producer – Mike ElizondoMixed By – Jean-Marie HorvatMixed By [Assistant] – Mimi ParkerProducer – The Y'sRecorded By – Paul FoleyWritten-By – J. Fauntleroy, J. Timberlake, Leona Lewis, M. Elizondo, R. Tadross

Backing Vocals – Che'NelleCo-producer – Harvey Mason, Jr.Coordinator [Production Coordination] – Angela N. GolightlyEngineer – John HanesEngineer [Assistant] – Tim RobertsInstruments – Frenchie Instruments, Producer – Vein Mixed By – Serban GheneaProducer – Uriel "Frenchie" KadouchRecorded By [Additional Vocals] – Dabling HarwardRecorded By [Vocals, Assistant] – David Boyd , Michael DaleyRecorded By [Vocals] – Andrew HeyWritten-By – Cheryline Lim, Gravriel Aminov, Keith Ross , Leona Lewis, Lundon J. Knighten, Michael Malih, Uriel Kadouch

Edited By [Pro-Tools, Assistant] – Tim RobertsEdited By [Pro-Tools] – John HanesInstruments, Producer, Recorded By – Shellback Mixed By – Serban GheneaProducer, Recorded By, Written-By – Kristian LundinWritten-By – Leona Lewis, Savan Kotecha