- Alicia Keys – lead vocals, backing vocals, producer
- Sanford Allen – concertmaster, violin
- Tony Black – engineer
- Richard Brice – viola
- Kurt Briggs – violin
- Avril Brown – violin
- Robert Chausow – viola
- Ray Chew – string conductor, string arrangements
- Barry Finclair – viola
- Eileen Folson – cello
- Sharief Hobley – guitar
- Stanley Hunte – violin
- John Legend – backing vocals
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- Harold Lilly – backing vocals
- Manny Marroquin – mixing
- Lori Miller – violin
- Ann Mincieli – engineer
- Caryl Paisner – cello
- Marion Pinheiro – violin
- Herb Powers Jr. – mastering
- Artie Reynolds – bass
- Maxine Roach – viola
- Al Schoonmaker – copyist
- Alexander Vselensky – violin
- Kanye West – producer
- Xin Zhao – violin
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