Arranged By, Drums, Keyboards, Programmed By – David FrankBacking Vocals – Christina AguileraDrums [Additional], Keyboards [Additional] – Steve KipnerLyrics By – David Frank, Pam Sheyne, Rudy Pérez, Steve KipnerMixed By – Bruce Weeden, Dave WayMusic By – David Frank, Pam Sheyne, Steve KipnerProducer – David Frank, Rudy Pérez, Steve KipnerRecorded By – Bruce Weeden, Joel Numa, Paul Arnold, Ryan James Freeland*

Acoustic Guitar – Manny López*, René Toledo*Arranged By [Horns], Saxophone – Ed CalleArranged By, Keyboards – Clay Perry, Rudy PérezBacking Vocals – Christina AguileraBass – Julio Hernández*Drum Programming, Percussion – Rudy PérezEngineer [Assistant] – Felipe TichauerLyrics By, Music By – Jorge Luis PilotoMixed By – Bruce WeedenPercussion [Live] – Richard BravoPiano [Solo] – Paquito HechavarriaProducer – Rudy PérezRecorded By – "Bassy" Bob Brockmann*, Bruce Weeden, Joel NumaTrombone – Dana TeboeTrumpet – Tony Concepción*

Arranged By [Backing Vocals] – Ron Fair, Rudy PérezArranged By, Keyboards, Programmed By – Ron Harris, Rudy PérezBacking Vocals – Christina AguileraBass – Julio Hernández*Engineer [Assistant] – Chris Wonzer, Felipe TichauerGuitar – Dan WarnerHandclaps [Palmadas Flamencas] – Agustin Pantoja*Lyrics By – Franne Golde, Rudy Pérez, Tom SnowMixed By – "Bassy" Bob Brockmann*Music By – Franne Golde, Tom SnowProducer – Rudy PérezRecorded By – "Bassy" Bob Brockmann*, Michael Ross*

Arranged By, Lyrics By, Music By, Producer – Rudy PérezBacking Vocals – Christina AguileraDrum Programming – Kristian "Renegade" PerezEngineer [Assistant] – Felipe TichauerGuitar – Dan WarnerGuitar [Spanish Guitar Solo] – Rudy PérezKeyboards, Programmed By – Clay Perry, Rudy PérezMixed By – "Bassy" Bob Brockmann*, Mike CouzziRecorded By – Bruce Weeden, Felipe Tichauer

Backing Vocals – Christina Aguilera, Wendy PedersenDrums, Programmed By – Johan Aberg, Paul ReinEngineer [Assistant] – Andrés Bermúdez*, Chris Wonzer, Felipe Tichauer, Tony FloresKeyboards – Paul ReinLyrics By – Johan Aberg, Paul Rein, Rudy PérezMixed By – Bruce Weeden, Peter MokranMusic By – Johan Aberg, Paul ReinProducer – Johan Aberg, Paul Rein, Rudy PérezRecorded By – Bruce Weeden, Johan Aberg, Michael Ross*

Acoustic Guitar, Drum Programming, Percussion – Rudy PérezArranged By [Strings] – Gary Lindsay, Rudy PérezArranged By, Keyboards – Clay Perry, Rudy PérezBacking Vocals – Geannie Cruz, Raúl Midón*Bass – Julio Hernández*Drums [Live] – Lee LevinEngineer [Assistant] – Felipe TichauerGuitar – Michael ThompsonLyrics By, Music By, Producer – Rudy PérezMixed By – Bruce WeedenRecorded By – Bruce Weeden, Felipe Tichauer, Joel Numa, Michael Ross*, Mike Greene*Strings – La Sinfónica de Utah*

Acoustic Guitar – Manny LopezArranged By, Producer – Rudy PérezBass – Julio Hernández*Drums – Lee LevinEngineer [Assistant] – Chris Wonzer, Felipe TichauerKeyboards – Rudy PérezLyrics By, Music By – Cesar Portillo De La LuzMixed By – Bruce WeedenPercussion – Richard BravoRecorded By – Bruce Weeden, Felipe Tichauer, Joel Numa, Michael Ross*

Arranged By, Arranged By [Horns], Drums, Programmed By [Keyboards] – Sergio GeorgeBacking Vocals – Christina Aguilera, Debra Resto*, Laurie VélezElectric Bass – Rubén Rodríguez*Engineer [Assistant] – Felipe TichauerLyrics By, Music By – Manuel Lopez*, Rudy PérezMixed By – Bruce WeedenPercussion – Marc Quiñonez*, Rafael PadillaPiano – Paquito HechavarriaProducer – Rudy Pérez, Sergio GeorgeProducer [Vocals] – Rudy PérezRecorded By – "Bassy" Bob Brockmann*, Bruce Weeden, Mario De Jesús*Saxophone – Ed CalleTrombone – Dana TeboeTrumpet – Tony Concepción*

Backing Vocals – Christina Aguilera, Rudy Pérez, Wendy PedersenEngineer [Assistant] – "Famous" David Nash*, Felipe Tichauer, Tom BenderExecutive-Producer – Diane Warren, Ron FairGuitar – Michael Thompson, Tim PierceLyrics By – Diane Warren, Rudy PérezMixed By – Bruce Weeden, Mick GuzauskiMusic By – Diane WarrenProducer – Guy Roche, Rudy PérezProgrammed By – Guy RocheRecorded By – Bruce Weeden, Joel Numa, Mario LuccySynthesizer [Moog] – John Glaser

Backing Vocals – Christina Aguilera, Wendy PedersenEngineer [Assistant] – Chris Wonzer, "Famous" David Nash*, Felipe Tichauer, Michael HuffGuitar – Bruce Watson, John GouxLyrics By – Guy Roche, Rudy Pérez, Shelly PeikenMixed By – Dave Way, Mike CouzziMusic By – Guy Roche, Shelly PeikenProducer – Guy Roche, Rudy PérezProgrammed By – Guy RocheRecorded By – Bruce Weeden, Mario Luccy, Ron FairTambourine – Matt Laug

Conductor – Jerry GoldsmithEngineer [Assistant] – Felipe Tichauer, Tony FloresLyrics By – David Zippel, Matthew Wilder, Rudy PérezMixed By – Mike Couzzi, Peter MokranMusic By – David Zippel, Matthew WilderOrchestrated By – Aaron Zigman, Matthew WilderProducer – Matthew Wilder, Rudy PérezRecorded By – Bruce Weeden, Phil Kaffel