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Engineer – Doc Little, Mike HatzingerGuitar – Anthony MazzaMixed By – Rob ChiarelliMixed By [Assistant] – Michael HuffProducer, Engineer, Programmed By – Ron Harris

Co-producer – Doreen DorianEngineer – Mario LuccyEngineer, Guitar – Ali BoudrisExecutive-Producer – Diane WarrenMixed By – Dave PensadoMixed By [Assistant] – Jeff GriffinProducer, Arranged By, Programmed By – Khris Kellow

Arranged By [Vocal] – Brock Walsh, Sheree Ford-PayneEngineer – Dan GarciaEngineer [Assistant] – Joe Brown Mixed By – Peter MokranMixed By [Assistant] – Tony FloresProducer, Arranged By [Vocal] – Travon Potts

Arranged By – Pam SheyneEngineer – Paul Arnold, Ryan James FreelandProducer, Recorded By, Arranged By, Keyboards, Drums – Steve KipnerProducer, Recorded By, Arranged By, Mixed By, Keyboards, Drums – David Frank

Backing Vocals – Evan RogersMixed By – Peter MokranMixed By [Assistant] – Tony FloresProducer – Carl Sturken, Evan RogersRecorded By – Al Hemberger

Arranged By – Aaron ZigmanConductor – Jerry GoldsmithMixed By – Peter MokranMixed By [Assistant] – Tony FloresProducer, Arranged By – Michael WilderRecorded By – Phil Kaffel

Mixed By – Peter MokranMixed By [Assistant] – Tony FloresProducer, Engineer, Programmed By – Johan AbergProducer, Programmed By, Keyboards – Paul ReinProducer, Recorded By [Vocal] – Aaron Zigman

Backing Vocals – Shelly PeikenEngineer – Mario LuccyGuitar – John GouxMixed By – Dave WayMixed By [Assistant] – Michael HuffProducer, Arranged By, Programmed By – Guy RocheTambourine – Matt Laug

Edited By – Bill MalinaMixed By – Dave PensadoMixed By [Assistant] – Jeff GriffinProducer, Mixed By, Drums, Keyboards, Bass Guitar – Pro J, Robin Thicke

Backing Vocals – Christina AguileraEngineer, Mixed By – Bruce Weeden, Dave WayProducer, Directed By – Rudy Pérez

Backing Vocals – Sue Ann CarwellEngineer – Mario LuccyExecutive-Producer – Diane WarrenGuitar – Tim PierceMixed By – Mick GuzauskiProducer, Arranged By, Programmed By – Guy RocheSynthesizer [Moog] – John Glaser

Arranged By – Steve PorcaroEngineer [Assistant] – Terri WongMixed By – Tommy VicariMixed By [Assistant] – Tim LauberPiano – Heather HolleyProducer, Engineer, Programmed By – Rob Hoffman

Backing Vocals – Evan RogersMixed By – Peter MokranMixed By [Assistant] – Tony FloresProducer – Carl Sturken, Evan RogersRecorded By – Al Hemberger