Katy Perry - Witness FLAC album

Drum Programming [Additional] – Rob SimonsenEngineer – Francesco Donadello, Rachael FindlenEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer, Instruments, Arranged By [Instruments] – Dustin O'HalloranVocals – Katy PerryWritten-By – Alexis Taylor, Ferras Alqaisi, Joe Goddard, Katy Perry

Acoustic Guitar – Max MartinBacking Vocals, Programmed By, Drums, Keyboards, Bass, Piano, Electric Guitar, Percussion – Ali PayamiEngineer – Rachael FindlenEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer – Ali Payami, Corin RoddickProducer [Additional Vocal Production] – Ali PayamiProducer [Vocals] – Max Martin, Rachael FindlenVocals – Katy PerryWritten-By – Corin Roddick, Katy Perry, Megan James, Sarah Hudson

Engineer – Elof Loelv, Rachael FindlenEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer [Vocals] – Max MartinProducer, Programmed By, Drums, Bass, Piano, Synthesizer – Elof LoelvVocals – Katy PerryWritten-By – Dijon McFarlane, Elof Loelv, Katy Perry, Lewis Hughes, Nicholas Audino, Noonie Bao

Backing Vocals – Shellback Engineer – Rachael FindlenEngineer [Assistant] – Cory Bice, Jeremy LertolaEngineer [Engineered For Mix] – John HanesFeaturing – MigosKeyboards, Programmed By – Oscar Holter, Shellback Mixed By – Serban GheneaProducer – Max Martin, Oscar Holter, Shellback Recorded By [Migos Vocals] – Daryl "DJ Durel" McPhersonVocals – Katy PerryWritten-By – Ferras Alqaisi, Katy Perry, Kiari Cephus, Kirsnick Ball, Max Martin, Oscar Holter, Quavious Marshall, Shellback

Edited By [Vocal Editing] – Noah "Mailbox" PassovoyEngineer – Noah "Mailbox" Passovoy, Rachael FindlenEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer – Corin RoddickProducer [Vocals] – Corin Roddick, Rachael FindlenVocals – Katy PerryWritten-By – Corin Roddick, Katy Perry, Megan James, Sarah Hudson

Engineer – Noah "Mailbox" Passovoy, Rachael FindlenEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer [Vocals] – Noah "Mailbox" PassovoyProducer, Guitar, Bass, Backing Vocals – Hayden JamesSynth – Hayden James, Thomas StellVocals – Katy PerryWritten-By – Ferras Alqaisi, Hayden James, Katy Perry, Thomas Stell

Bass – Pino PalladinoChoir [Gospel Studio Choir] – Alexandra Brown, Anthony Evans, Aretha Scruggs, Brandon Winbush, Briana Lee, Carmel Echols, Carmen Carter, Carmen Twillie, Charlean Carmon, Clydene Jackson, David Loucks, Denise Carite, Edie Lehmann Boddicker, Eyvonne Williams, Jamie McCrary, Jason Woods , Jim Gilstrap, Louis Price, Luke Edgemon, Monique Donnelly, Nelson Beato, Oren Waters, Toni Scruggs, Will WheatonContractor [Vocal Contracting], Conductor [Gospel Choir Conducting] – Edie Lehmann BoddickerEngineer – Noah "Mailbox" Passovoy, Rachael Findlen, Ryan NasciEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer [Additional], Drum Programming [Additional] – IllangeloProducer [Vocals] – Noah "Mailbox" PassovoyProducer, Keyboards, Drum Programming – Jeff BhaskerVocals – Katy PerryWritten-By – Jeff Bhasker, Katy Perry, Sarah Hudson

Bass – Joshua MoreauEngineer – Noah "Mailbox" Passovoy, Rachael Findlen, Stephen "The Sauce" HybickiEngineer [Engineered For Mix] – John HanesGuitar – Casey HooperMixed By – Serban GheneaProducer – Mike WiLL Made-It, ScoolyProducer [Additional], Producer [Vocals], Keyboards, Percussion, Programmed By [Additional] – Noah "Mailbox" PassovoyVocals – Katy PerryWritten-By – Katy Perry, Marcus Bell , Mia Moretti, Michael Williams , Sarah Hudson

Backing Vocals – Katy Perry, Shellback Engineer – Sam HollandEngineer [Assistant] – Cory Bice, Jeremy LertolaEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer, Programmed By, Keyboards, Bass, Drums, Percussion, Synth – Ali Payami, Max Martin, Shellback Vocals – Katy PerryWritten-By – Ali Payami, Ferras Alqaisi, Katy Perry, Max Martin, Shellback

Engineer – Noah "Mailbox" Passovoy, Rachael FindlenEngineer [Additional] – Aubry "Big Juice" DelaineEngineer [Assistant] – Zeke MishanecEngineer [Engineered For Mix] – John HanesEngineer [Nicki Minaj Vocals Assistant Engineered] – Iain FindlayFeaturing – Nicki MinajKeyboards – PJ "Promnite" SledgeMixed By – Serban GheneaProducer [Additional] – Noah "Mailbox" Passovoy, PJ "Promnite" SledgeProducer [Vocals], Keyboards [Additional], Programmed By [Additional] – Noah "Mailbox" PassovoyProducer, Synth, Drums, Programmed By – Duke DumontRecorded By [Nicki Minaj Vocals] – Aubry "Big Juice" DelaineVocals – Katy PerryWritten-By – Brittany Hazzard, Duke Dumont, Katy Perry, Onika Maraj, PJ "Promnite" Sledge, Sarah Hudson

Backing Vocals – Katy Perry, Max Martin, Sia, Skip MarleyDrums, Bass, Synth, Piano, Handclaps [Epic Claps] – Ali PayamiEngineer – Sam HollandEngineer [Assistant] – Cory Bice, Jeremy LertolaEngineer [Engineered For Mix] – John HanesFeaturing – Skip MarleyGuitar [Funky Guitar] – James Alan GhalebMastered By – Tom CoyneMixed By – Serban GheneaPercussion – Ali PayamiProducer, Programmed By – Ali Payami, Max MartinSynthesizer [Prophet 6 & Solina] – Max MartinVocals – Katy PerryWritten-By – Ali Payami, Katy Perry, Max Martin, Sia Furler, Skip Marley

Engineer – Noah "Mailbox" Passovoy, Rachael FindlenEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer [Vocals] – Noah "Mailbox" PassovoyProducer, Instruments – Jack GarrattVocals – Katy PerryWritten-By – Jack Garratt, Katy Perry, William Robinson

Edited By [Vocal Editing] – Noah "Mailbox" Passovoy, Oscar HolterEngineer – Noah "Mailbox" Passovoy, Rachael FindlenEngineer [Engineered For Mix] – John HanesKeyboards, Programmed By – Oscar HolterMixed By – Serban GheneaProducer – Corin Roddick, Oscar HolterProducer [Vocals] – Corin Roddick, Rachael FindlenVocals – Katy PerryWritten-By – Corin Roddick, Katy Perry, Megan James, Sarah Hudson

Backing Vocals – Astrid S, Katy PerryBass, Synth, Piano – Ali PayamiEngineer – Sam HollandEngineer [Assistant] – Cory Bice, Jeremy LertolaEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaPerformer [Max's Tooth] – Max MartinProducer, Programmed By, Percussion – Ali Payami, Max MartinVocals – Katy PerryWritten-By – Ali Payami, Katy Perry, Max Martin, Sarah Hudson, Sia Furler

Backing Vocals – Max MartinDrums, Bass, Synth, Piano, Acoustic Guitar – Ali PayamiEngineer – Sam HollandEngineer [Assistant] – Cory Bice, Jeremy LertolaEngineer [Engineered For Mix] – John HanesMixed By – Serban GheneaProducer, Programmed By, Percussion – Ali Payami, Max MartinVocals – Katy PerryWritten-By – Ali Payami, Katy Perry, Max Martin, Savan Kotecha