Engineer [Assistant] – Ryan Smith , Tim RobertsInstruments [All Instruments] – Chad Hugo, Pharrell WilliamsMixed By – Serban GheneaProducer – The NeptunesRecorded By [At Master Sound] – Andrew Coleman Recorded By [At Right Track] – Brian GartenVocals [All Vocals] – Britney SpearsWritten-By – C. Hugo*, P. Williams*

Backing Vocals – BossLady, Britney SpearsEngineer [Assistant At Battery] – Charles McCroreyEngineer [Pro Tools And Vocalwestefoolaway] – John AmatielloEngineer [Pro Tools At Battery] – Michael "PGA Tour" Tucker*Guitar [Guitars] – Max MartinMixed By – Max Martin, RamiProducer – Max Martin, RamiRecorded By – Max Martin, RamiTurntables – Daniel SavioWritten-By – M. Martin*, Rami

Backing Vocals – Britney Spears, Jennifer KarrBass – Josh SchwartzDrum Programming, Programmed By [Keyboard] – Brian Kierulf, Rodney JerkinsEngineer [Assistant] – Aaron Kaplan, Javier Valverde, Jill TenganGuitar – Brian Kierulf, Isaac Phillips, Josh SchwartzMixed By – Jean-Marie HorvatProducer – Rodney JerkinsProducer [Vocals], Arranged By [Vocals] – Brian Kierulf, Josh SchwartzRecorded By [At 2nd Floor] – Fabian MarasciulloRecorded By [At Rusk Sound, The DOJO & Battery] – Brian Kierulf, Josh SchwartzWritten-By – B. Kierulf*, B. Spears*, J. Schwartz*, R. Jerkins*

Backing Vocals – Jeanette Olsson, Max MartinBass – Thomas LindbergEngineer [Assistant At Battery] – Charles McCroreyEngineer [Pro Tools And Vocalwestefoolaway] – John AmatielloGuitar [Guitars] – Esbjörn ÖhrwallProducer – Max Martin, RamiRecorded By [Lead Vocals At Battery] – Michael TuckerRecorded By, Mixed By – Max Martin, RamiWritten-By – Dido, M. Martin*, Rami

Engineer [Assistant] – Dan Milazzo, Tim RobertsInstruments [All Instruments] – Chad Hugo, Pharrell WilliamsMixed By – Serban GheneaProducer – The NeptunesRecorded By [At Master Sound] – Andrew Coleman Recorded By [At Right Track] – Brian GartenVocals [All Vocals] – Britney SpearsWritten-By – C. Hugo*, P. Williams*

Arranged By [Strings] – Jimmy Biondolillo*, Mark SuozzoBacking Vocals – Britney Spears, Jennifer KarrBass, Guitar [Additional] – Brian KierulfEngineer [Assistant] – Aaron Kaplan, Charles McCrorey, Jill Tengan, Rich TapperGuitar – Nile RodgersMixed By – Stephen GeorgeProducer – Brian Kierulf, Josh SchwartzProgrammed By [All Programming] – Brian KierulfRecorded By – Brian Kierulf, Josh SchwartzRecorded By [Strings] – YasuWritten-By – B. Kierulf*, B. Spears*, J. Schwartz*

Backing Vocals – Albert D. Hall, Ann Marie Bush, Chris Thompson, Damien Hall, Deann Dover, Jason R. Scheff*, Jeff Pescetto, Maxayn Morguchi*, Sue Ann Carwell, Tyler Collins, Will Wheaton, Jr.*Engineer [Assistant] – Javier Valverde, Marc LeeGuitar [Guitars] – Paul UmbachMixed By – Jean-Marie HorvatProducer – Rodney JerkinsRecorded By – Brad Gilderman, Fabian MarasciulloScratches – Corey ChaseWritten-By – A. Merrill*, J. Hooker*

Backing Vocals – Britney Spears, Jeanette OlssonEngineer [Assistant], Engineer [Pro Tools] – John AmatielloProducer – Max Martin, RamiRecorded By, Mixed By – Max Martin, RamiWritten-By – B. Spears*, M. Martin*, Rami

Backing Vocals – Britney Spears, Jennifer KarrBass – Brian KierulfDrum Programming, Programmed By [Keyboard] – Brian Kierulf, Rodney JerkinsEngineer [Assistant] – Aaron Kaplan, Charles McCrorey, Javier Valverde, Jill Tengan, Rich TapperGuitar [Guitars] – Isaac PhillipsMixed By – Jean-Marie HorvatProducer – Rodney JerkinsProducer [Vocals], Arranged By [Vocals] – Brian Kierulf, Josh SchwartzRecorded By [At 2nd Floor] – Fabian MarasciulloRecorded By [At Rusk Sound, The DOJO & Battery] – Brian Kierulf, Josh SchwartzWritten-By – B. Kierulf*, B. Spears*, J. Schwartz*

Backing Vocals – Annika Törnkvist*, BossLady, Nana HedinEngineer [Assistant], Engineer [Pro Tools] – John AmatielloProducer – Max Martin, RamiRecorded By, Mixed By – Max Martin, RamiWritten-By – M. Martin*, Rami

Backing Vocals – Britney Spears, Jennifer KarrEngineer [Assistant] – Rich TapperMixed By – Michael TuckerProducer – Brian Kierulf, Josh SchwartzProducer, Recorded By – Brian Kierulf, Josh SchwartzProgrammed By [All Programming], Instruments [All] – Brian KierulfWritten-By – B. Kierulf*, B. Spears*, J. Schwartz*

Engineer [Vocals At Shanesongs] – Mathias Wenge*Mixed By – Peter Kvint, Simon NordbergMixed By [Additional Mixing] – Hoffe Stannow*Producer – Peter KvintRecorded By – Peter KvintWritten-By – Dan Hill, Jörgen Elofsson

Arranged By [Vocals] – Justin TimberlakeEngineer [Assistant] – Charles McCrorey, Jamie Duncan , Rich JohnsonInstruments [All Music] – Wade J. Robinson*Mixed By – Rich TravaliProducer – Justin Timberlake, Wade J. RobsonRecorded By [At Battery] – Michael TuckerRecorded By [At Westlake Audio] – Pablo MunguiaVocals – Justin TimberlakeWritten-By – J. Timberlake*, W. Robson*