Arranged By [Orchestral And String Arrangement] – Onree Gill, will.i.am*Mixed By – Dylan "3-D" Dresdow*Orchestra [Orchestral Portions] – Czech Symphony OrchestraProducer – will.i.am*Recorded By [Czech Symphony Orchestra], Engineer [Czech Symphony Orchestra] – Michal PekárekVocals [Additional] – Shelby SpalioneWritten-By – Jack Milas, Oli Chang, William Adams*

Arranged By [Orchestral And String Arrangement] – Onree Gill, will.i.am*Drum Programming – Michael McHenry*, will.i.am*Keyboards – Michael McHenry*Mixed By – Afrojack, Dylan "3-D" Dresdow*, will.i.am*Orchestra [Orchestral Portions] – Czech Symphony OrchestraProducer – Afrojack, Free School , will.i.am*Recorded By [Czech Symphony Orchestra], Engineer [Czech Symphony Orchestra] – Michal PekárekRecorded By, Engineer – Afrojack, Padraic "Padlock" Kerin*, will.i.am*Written-By – Jean Baptiste , Michael McHenry*, Padraic Kerin, Ryan Buendia, William Adams*

Arranged By [Strings] – Onree Gill, will.i.am*Bass – Kevin C. BrandonCello – Miguel Martinez , Peggy BaldwinComposed By [Strings] – Onree GillEngineer [Assistant] – Justin MerrillFeaturing – Eva SimonsHorns – Joseph Meyer*, Justin HagemanMixed By – Dylan "3-D" Dresdow*Mixed By [Assistant] – AJ Clark, Jaime MartinezProducer, Synthesizer – Sebastian Ingrosso, Steve Angello, will.i.am*Recorded By [Eva Simons' Vocals], Engineer [Eva Simons's Vocals] – Eva SimonsRecorded By, Engineer – Padraic "Padlock" Kerin*, will.i.am*Viola – James Ross, Karen ElaineViolin – Charlie Bisharat, Christopher Woods, Chung Mei Chang, Kathleen Robertson, Lesa Terry, Mark Cargill, Nicole Garcia, Richard Adkins, Susan ChatmanWritten-By – Eva Maria Simons*, Max Martin, Mike Hamilton , Sebastian Ingrosso, Steve Angello, William Adams*

Drum Programming – Lazy Jay, will.i.am*Engineer [Additional Engineering Of Britney Spears' Vocals] – David Levy , Norm BantomFeaturing – Britney SpearsKeyboards, Programmed By [MIDI Programming] – Lazy JayMixed By – Dylan "3-D" Dresdow*Producer [Additional], Synthesizer, Bass [Moog Bass] – will.i.am*Producer, Recorded By, Engineer – Lazy JayRecorded By [Vocals], Engineer [Vocals] – Padraic "Padlock" Kerin*, will.i.am*Written-By – Jean Baptiste , Jef Martens, William Adams*

Featuring – Chris Brown Mixed By – Dylan "3-D" Dresdow*, will.i.am*Producer, Synthesizer, Drum Programming – will.i.am*Recorded By, Engineer – Dustin "Chi" Capulong*, Padraic "Padlock" Kerin*, will.i.am*Written-By – Artem Stoliarov*, Chris Brown , William Adams*

Drum Programming – Freshm3n III, Michael McHenry*Featuring – 2NE1, apl.de.ap*Guitar – Alain WhyteKeyboards – Jean Baptiste , Michael McHenry*Mixed By – Dylan "3-D" Dresdow*, will.i.am*Producer – Free School , Freshm3n III, will.i.am*Recorded By, Engineer – Padraic "Padlock" Kerin*, will.i.am*Synthesizer – Freshm3n IIIWritten-By – Alain Whyte, Allan Pineda, Jean Baptiste , Michael McHenry*, William Adams*

Coordinator [Production Coordination] – Irene Richter, Katie Mitzell, Padraic "Padlock" Kerin*Engineer [Assistant] – Rachael FindlenMixed By – Dylan "3-D" Dresdow*, will.i.am*Producer – will.i.am*Recorded By, Engineer – Clint Gibbs, Padraic "Padlock" Kerin*, will.i.am*Written-By – Henry Walter, Lukasz Gottwald, William Adams*

Featuring – Juicy JMixed By – Dylan "3-D" Dresdow*, will.i.am*Producer – Freshm3n III, Poet , will.i.am*Programmed By [Additional Programming] – JakpotRecorded By, Engineer – Mike "Crazy Mike" Foster*, Padraic "Padlock" Kerin*, Poet , will.i.am*Synthesizer, Drum Programming – Freshm3n IIIWritten-By – Darrell Eversley, Howard Eversley, Jaime L. Munson*, Jordan Houston, Shaun Spearman, William Adams*

Featuring – Justin BieberMixed By – Steve DudaProducer, Drum Programming – Damien Leroy, will.i.am*Recorded By [Justin Bieber’s Vocals], Engineer [Justin Bieber’s Vocals] – Chris 'Tek' O'Ryan*, Josh GudwinRecorded By, Engineer – Damien Leroy, Padraic "Padlock" Kerin*, will.i.am*Synthesizer – Damien LeroyWritten-By – Damien Leroy, Justin Bieber, William Adams*

Drum Programming – Freshm3n IIIMixed By – Dylan "3-D" Dresdow*Producer – Damien Leroy, Freshm3n III, will.i.am*Recorded By – will.i.am*Synthesizer – Damien LeroyWritten-By – Damien Leroy, William Adams*

Acoustic Guitar – George Pajon, Jr.*Arranged By [Orchestral And String Arrangement] – Onree Gill, will.i.am*Electric Bass – Caleb SpeirFeaturing – Dante SantiagoMixed By – Dylan "3-D" Dresdow*, will.i.am*Orchestra [Orchestral Portions] – The Czech Symphony Orchestra*Producer, Drum Programming, Synthesizer, Tambourine – will.i.am*Recorded By [Czech Symphony Orchestra], Engineer [Czech Symphony Orchestra] – Michal PekárekWritten-By – Caleb Speir, George Pajon, Jr.*, William Adams*

Arranged By [Orchestral And String Arrangement] – Onree Gill, will.i.am*Coordinator [Production Coordination] – Andrew "Muffman" Luftman*, Irene Richter, Katie Mitzell, Padraic "Padlock" Kerin*, Scott "Yarmov" Yarmovsky*Engineer [Assistant] – Rachael FindlenEngineer [Engineered For Mix] – John HanesFeaturing – Miley CyrusMixed By – Serban GheneaMixed By [Additional] – Dylan "3-D" Dresdow*Orchestra [Orchestral Portions] – Czech Symphony OrchestraProducer – Benny Blanco , Cirkut*, Dr. LukeRecorded By [Czech Symphony Orchestra], Engineer [Czech Symphony Orchestra] – Michal PekárekRecorded By, Engineer – Clint Gibbs, Padraic "Padlock" Kerin*, will.i.am*Written-By – Benjamin Levin, Henry Walter, Lukasz Gottwald, William Adams*

Drum Programming – will.i.am*, Zach "gfg" JonesFeaturing – Skylar GreyMixed By – Dylan "3-D" Dresdow*Producer – will.i.am*Producer [Additional] – Zach "gfg" JonesSynthesizer – Damien Leroy, Zach "gfg" JonesWritten-By – Holly Hafermann*, Keith Harris, William Adams*, Zachary Jones*

Coordinator [Production Coordination] – Irene Richter, Katie Mitzell, Padraic "Padlock" Kerin*Engineer [Assistant] – Rachael FindlenFeaturing – Nicole ScherzingerMixed By – Dylan "3-D" Dresdow*, will.i.am*Producer – will.i.am*Recorded By, Engineer – Clint Gibbs, Padraic "Padlock" Kerin*, will.i.am*Written-By – Henry Walter, Lukasz Gottwald, William Adams*

Arranged By [String Arrangement] – Onree GillFeaturing – Baby KaelyHorns – Adam Wolf, John Eagle Mixed By – Dylan "3-D" Dresdow*Producer – Maejor AliRecorded By [Strings & Horns], Engineer [Strings & Horns] – Ghazi Hourani, Padraic "Padlock" Kerin*Recorded By, Engineer – Daniel Zaidenstadt, will.i.am*Strings – Adrienne Woods, Cameron Stone, Chris Woods , Emily Moore, Ginny Luke, James Klopfleisch, Lucine Fyelon, Neel HammondWritten-By – Brandon Green, Calvin Johnson , William Adams*

Backing Vocals – Dante SantiagoCello – Miguel Martinez , Peggy BaldwinChoir [Oasis Academy Hadley School Gospel Choir] – Atlanta McCollin, Benjamina Kilembe, Boluwatife Adegboyega, Carole Kuhuma, Courage Emeka, Elizabeth Reynolds, Eunice Kusonika, Jessica Woodland, Kalender Dogan, Milca Kusonika, Peniel Mbembele, Stanley Buffonge, Tre Copland-Williams, Trudy-Ann BrownChoir [Southfield Gospel Choir] – Autumn Reid, Bethany Antonio, Charley Collin-Walters, Charly O'Grady, Chloe Leacy, Danielle Wilson, Dayna Pearson, Hillary Yeboah, Jade McCarthy, Jazmine Edwards, Kieran Williams, Liam Perez, Serena Brown, Tia Rankin, Zion AkusufosterCo-producer, Synthesizer – AudiobotDirected By [Oasis Academy Hadley School Gospel Choir And Southfield Gospel Choir] – Jaz EllingtonDouble Bass [Upright Bass] – Kevin C. BrandonDrum Programming – Audiobot, will.i.am*Engineer [Assistant] – Bradford H. Smith*Horns – Daniel P. Kelley, Jenny Kim*, Joseph Meyer*, Justin HagemanMixed By – Dylan "3-D" Dresdow*, Steve DudaMixed By [Assistant] – AJ Clark, Jaime MartinezProducer – will.i.am*Recorded By, Engineer – Padraic "Padlock" Kerin*, will.i.am*Timpani – Chester EnglanderViola – Christopher Woods, James RossViolin – Chung Mei Chang, Kathleen Robertson, Lesa Terry, Mark Cargill, Nicole Garcia, Richard Adkins, Susan Chatman, Terrence Glenny*, Yvette DevereauxVocals [Additional] – Lil Jon*Vocals [Vocal Performances] – Oasis Academy Hadley School Gospel Choir, Southfield Gospel ChoirWritten-By – Kenny Oliver*, Onree Gill, William Adams*Written-By [Strings], Composed By [Strings], Arranged By [Strings] – Onree Gill, William Adams*

Backing Vocals – Nicole ScherzingerGuitar – George Pajon, Jr.*Mixed By – Dylan "3-D" Dresdow*Producer, Drum Programming – will.i.am*Written-By – Antonio Maria*, George Pajon, Jr.*, Luis Bonfa*, William Adams*

Mixed By – Dylan "3-D" Dresdow*, will.i.am*Producer, Drum Programming, Synthesizer, Recorded By [Will.i.am’s Vocals], Engineer [Will.i.am’s Vocals] – will.i.am*Vocals [Additional] – Shelby SpalioneWritten-By – Cecil Mack, James P. Johnson*, Sonny Bono, William Adams*