- Alicia Keys – lead vocals, backing vocals, producer, executive producer, piano, keyboards, clavinet, Rhodes piano, synthesizer, instrumentation, string arrangements
- Sanford Allen – concertmaster, violin
- Alli – art direction, design
- Ayako – make-up
- Elijah Baker – bass
- Julien Barber – viola
- Katreese Barnes – backing vocals
- Pablo Batista – percussion
- Tony Black – engineer, mixing
- Richard Brice – viola
- Kurt Briggs – violin
- Kerry "Krucial" Brothers – drums, instrumentation, producer, digital programming, engineer
- Avril Brown – violin
- Stockley Carmichael – backing vocals
- Fred Cash, Jr. – bass
- Robert Chausow – viola
- Ray Chew – string arrangements, string conductor
- Dre & Vidal – instrumentation, producers
- Vincent DiLorenzo – engineer
- Darryl Dixon – horn
- Ronnie Drayton – guitar
- Easy Mo Bee – producer, digital programming
- Peter Edge – executive producer
- Russell Elevado – mixing
- Marisol Espada – cello
- Michael Evans – production coordinator
- Barry Finclair – viola
- Eileen Folson – cello
- Alan Ford – assistant mixing
- Dan Gautreau – assistant engineer
- Onree Gill – Hammond B3, Rhodes piano
- L. Green – backing vocals
- Andricka Hall – backing vocals
- Sharief Hobley – guitar
- Stanley Hunte – violin
- Paul John – drums
- Steve Jordan – drums
- Kumasi – producer, digital programming, synthesizer
- Gwendolyn Laster – violin
- Chris LeBeau – art department production
- John Legend – backing vocals
- Harold Lilly – backing vocals
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- Manny Marroquin – mixing
- Hugh McCracken – guitar
- Melissa Meell – cello
- Lori Miller – violin
- Walter Millsap III – engineer
- Ann Mincieli – engineer
- Cindy Mizelle – backing vocals
- Caryl Paisner – cello
- Jermaine Paul – backing vocals
- William E. Pettaway, Jr. – production coordinator
- Marion Pinheiro – violin
- Herb Powers, Jr. – mastering
- Ricky Quinones – guitar
- Artie Reynolds – bass
- Tim Christian Riley – piano
- Maxine Roach – viola
- Jeff Robinson – executive producer, management
- Steve "Styles" Rodriguez – bass
- Joe Romano – horn
- Erika Rose – backing vocals
- Warwick Saint – photography
- Al Schoonmaker – copyist
- John "Jubu" Smith – guitar
- Taneisha Smith – backing vocals
- Denise Stoudmire – backing vocals
- Dale Stuckenbruck – violin
- Timbaland – producer
- Nicole Tucker – hair stylist
- Rabeka Tuinei – assistant mixing
- Pat Viala – mixing
- Wouri Vice – assistant stylist
- Marla Weinhoff Studio – set design
- Peter VanDerwater – viola
- Arcell Vickers – organ
- Alexander Vselensky – violin
- David Watson – horn, saxophone, flute
- Willie Weeks – bass
- Kanye West – producer
- Carl "Rev" Wheeler – Wurlitzer, organ
- Artie White – guitar
- Dwayne "D. Wigg" Wiggins – producer, sitar, bass, guitar
- Jessica Wilson – backing vocals
- Patti Wilson – stylist
- Xin Zhao – violin
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