Circus

Engineer [Additional Pro Tools Engineering, Assisted By] – Tim RobertsEngineer [Additional Pro Tools Engineering] – John HanesMixed By – Serban GheneaProducer – K. Briscoe, The OutsydersRecorded By – Bojan "Genius" Dugic*, Brendan DekoraRecorded By [Additional Recording] – Jim Beanz, Marcella "Ms. Lago" Aracia*Recorded By [Assisted By] – Derik LeeWritten-By – Nikesha Briscoe, Rafael Akinyemi

Backing Vocals – Cathy Dennis, Claude Kelly, Myah MarieDrums, Keyboards, Programmed By – Benny Blanco , Lukasz GottwaldEdited By [Vocal Editing] – Emily Wright, Matt BecklyEngineer [Additional Pro Tools Engineering, Assisted By] – Tim RobertsEngineer [Additional Pro Tools Engineering] – John HanesGuitar – Lukasz GottwaldMixed By – Serban GheneaProducer – Benny Blanco , Dr. LukeRecorded By – Emily Wright, Matt Beckly, Sam HollandRecorded By [Assisted By] – Chad Carlisle, Chris Kasych, Eric Weaver, Tatiana GottwaldWritten-By – Benjamin Levin, Claude Kelly, Lukasz Gottwald

Backing Vocals – Leah HaywoodDrum Programming – Andy Page, Guy SigsworthElectric Guitar, Acoustic Guitar, Synthesizer [Synth Bass] – Andy PageProducer – Guy SigsworthRecorded By [Assisted By], Mixed By [Assisted By] – Valente TorrezRecorded By, Mixed By – Andy PageStrings, Keyboards, Sampler [Hang Samples] – Guy SigsworthWritten-By – Arnthor Birgisson*, Shelly Peiken, Wayne Hector

Edited By [Pro Tools Editing] – Ron TaylorProducer – DanjaProducer [Vocal Production] – Jim BeanzRecorded By [Assisted By], Mixed By [Assisted By] – Jared NewcombRecorded By, Mixed By – Marcella "Ms. Lago" Aracia*Written-By – James Washington , Luke Boyd, Marcella Araica, Nathaniel Hills*

Backing Vocals – Claude Kelly, Windy WagnerDrums, Keyboards, Programmed By – Benny Blanco , Lukasz GottwaldEdited By [Vocal Editing] – Emily WrightEngineer [Additional Pro Tools Engineering, Assisted By] – Tim RobertsEngineer [Additional Pro Tools Engineering] – John HanesGuitar – Lukasz GottwaldMixed By – Serban GheneaProducer – Benny Blanco , Dr. LukeProducer [Additional Vocal Production, Assisted By] – Aniela Gottwald*, Chris Kasych, Eric Eylands, Eric WeaverProducer [Additional Vocal Production] – Claude KellyRecorded By – Emily Wright, Sam HollandWritten-By – Benjamin Levin, Claude Kelly, Lukasz Gottwald

Backing Vocals – Britney Spears, Kinnda, Max MartinEngineer [Additional Pro Tools Engineering, Assisted By] – Tim RobertsEngineer [Additional Pro Tools Engineering] – John HanesMixed By – Serban GheneaProducer – Max MartinProgrammed By – Max Martin, Shellback Recorded By – Seth Waldmann, Seth WaldmannRecorded By [Additional Recording, Assisted By] – Eric EylandsWritten-By – Alexander Kronlund, Max Martin, Savan Kotecha, Shellback

Backing Vocals – Kasia LivingstonGuitar [Additional] – Henrik JonbackKeyboards, Bass, Guitar – Bloodshy & AvantMixed By – Anders Hvenare, Bloodshy & AvantProducer – Bloodshy & AvantProgrammed By – Bloodshy & AvantRecorded By – Andrew Wyatt, Avant, Bloodshy, Henrik JonbackWritten-By – Christian Karlsson, Henrik Jonback, Kasia Livingston, Pontus Winnberg

Backing Vocals – Luke BoydEdited By [Pro Tools Editing] – Ron TaylorProducer – DanjaRecorded By [Assisted By], Mixed By [Assisted By] – Jared NewcombRecorded By, Mixed By – Marcella "Ms. Lago" Aracia*Written-By – Marcella Araica, Nathaniel Hills*, Stacy Barthe

Backing Vocals – Nicole MorierGuitar – Chris Worthy, Chris WorthyMixed By – Tony MaseratiMusic By, Programmed By – Let's Go To WarProducer – Let's Go To WarProducer [Vocals] – Nicole MorierRecorded By – Henry WalterRecorded By [Additional Recording, Assisted By] – Eric EylandsRecorded By [Additional Recording] – Eric WeaverWritten-By – Adrian Gough, Britney Spears, Henry Walter, Nicole Morier, Peter-John Kerr

Mixed By – Harvey Mason Jr.Other [Production Coordination] – Angela N. Golightly, David "Touch" WrightProducer – Harvey Mason, Jr.*, Rob KnoxRecorded By – Andrew Hey, Dabling HarwardRecorded By [Additional Recording] – David Boyd Written-By – Britney Spears, Harvey Mason, Jr.*, James Fauntleroy II, Rob Knox

Backing Vocals – Debi Nova, Kesha SebertCo-producer – Benny Blanco Drums, Keyboards, Programmed By – Benny Blanco , Lukasz GottwaldEdited By [Vocal Editing] – Emily WrightEngineer [Additional Pro Tools Engineering, Assisted By] – Tim RobertsEngineer [Additional Pro Tools Engineering] – John HanesGuitar – Lukasz GottwaldMixed By – Serban GheneaProducer – Dr. LukeRecorded By – Emily Wright, Sam HollandRecorded By [Assisted By] – Aniela Gottwald*, Eric Eylands, Eric WeaverWritten-By – Benjamin Levin, Frankie Storm, Lukasz Gottwald, Ronnie Jackson

Acoustic Guitar, Electric Guitar, Piano, Strings, Synthesizer, Drum Programming – Andy PageProducer – Guy SigsworthRecorded By [Assisted By], Mixed By [Assisted By] – Brendan DekoraRecorded By, Mixed By – Andy PageWritten-By – Britney Spears, Guy Sigsworth

Backing Vocals – Candice NelsonBass, Guitar – Henrik JonbackCo-producer – The ClutchKeyboards, Programmed By, Bass [Additional], Guitar [Additional] – Bloodshy & AvantMixed By – Niklas FlycktProducer – Bloodshy & AvantRecorded By – Bloodshy & Avant, The ClutchRecorded By [Additional Recording] – Jim Carauna*Written-By – Balewa Muhammad, Candice Nelson, Christian Karlsson, Ezekiel Lewis, Henrik Jonback, Patrick "J. Que" Smith*, Pontus Winnberg