- OutKast – Executive producer
- André Benjamin – Soloist, vocals, background vocals, acoustic and electric guitar, keyboards, *tenor sax, programming, producer
- Big Boi – Vocals, producer
- Aaron Mills – Bass
- Jef Van Veen – Drums
- Alex Reverberi – Assistant
- Antwan Patton – Vocals, background vocals, drum programming, keyboards, programming, producer
- Benjamin Wright – String arrangements, string conductor
- Bernie Grundman – Mastering
- Big Gipp – Vocals, background vocals
- Bonnie Hayes & the Wild Combo – Vocals
- Brian "Big Bass" Gardener – Mixing
- Brian Gardner – Mastering
- Brian Paturalski – Engineer
- Carl Mo – Producer
- Catherine Chan – Cello
- Cee-Lo Green – Vocals
- Charles Veal – Concert Master, violin
- Chris Carmouche – Assistant, engineer
- Chris Steffen – Assistant
- Cutmaster Swift – Cut, producer
- Darrel Thorpe – Engineer
- Darrell Thorp – Mixing
- Darryl Otis Smith – Guitar
- David Arenz – Strings
- David Braitberg – Strings
- David Whild – Guitar
- Debra Killings – Bass, background vocals
- Dexter Simmons – Mixing
- Dojo5 – Producer
- Donald Whittemore – Assistant
- Donnie Mathis – Guitar
- East Side Boyz – Vocals
- Eleanor Arnez – Strings
- Eric Johnson – Strings
- Gina Kronstadt – Violin
- Greg Burns – Assistant
- Greg Price – Assistant
- Hornz Unlimited – Horn, trumpet, horn arrangements
- Jared Robbins – Assistant
- Jay-Z – Vocals
- Jazze Pha – Background Vocals
- Jazze Pha – Vocals
- Jeff Moses – Assistant
- Jeffrey Schulz – Art direction, design
- Jeminesse "Slimm Jim" Smith – Programming
- Jim Sitterly – Violin
- Joe-Mama Nitzberg – Creative Director
- John Frisbee – Director
- John Frye – Engineer, pre-mixing, mixing
- John Krovoza – Cello
- Joi – Background vocals, vocals
- Jonathan Mannion – Photography
- Josh Monroy – Assistant
- Kelis – Vocals
- Kevin "KD" Davis – Mixing
- Kevin Brandon – Double bass
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- Kevin Kendricks – Guitar, keyboards
- Kevin O'Neal – Double bass
- Kevin Smith – Bass – Electric
- Killer Mike – Vocals, background vocals
- King Stephen – Vocals
- Konkrete – Vocals
- Lavish-J (GROOMER/PHOTOGRAPHER)
- L.A. Reid – Executive Producer
- Lil Jon – Vocals
- Lisa Chien – Cello
- Louis Kabok – Violin
- Ludacris – Vocals
- Malik Albert – Assistant
- Marcy Vaj – Viola
- Marianne Lee Stitt – Background Vocals
- Mark Cargill – Violin
- Mark Casillas – Violin
- Martin Smith – Cello
- Marvin "Chanz" Parkman – Organ, keyboards
- Matt Still – Engineer
- Mello – Vocals, background vocals
- Michele Nardone – Viola
- Mildryln "Big Gul" Andrews – Background vocals
- Moffett Morris – Upright Bass
- Moka Nagatani – Engineer
- Mr. DJ – Producer
- Myrna Crenshaw – Background vocals
- Myrna Crenshaw – Vocals
- Neal H. Pogue – Mixing
- Neil Pogue – Mixing
- Norah Jones – Vocals
- Padraic Kernin – Assistant, engineer
- Patrick Morgan – Viola
- Pete Novak – Engineer, pre-mixing, mixing
- Rabeka Tuinei – Assistant
- Rajinder Kala – Conga
- Reggie Doizier – Mixing
- Regina Davenport – A&R, artist coordination, production coordination
- Reginald Dozier – Engineer
- Richard Adkins – Violin
- Richard Keller – Strings, string arrangements
- Robert Hannon – Engineer
- Robin Ross – Viola
- Rosario Dawson – Vocals
- Russell Buelna – Assistant
- Sanford Salzinger – Strings
- Sleepy Brown – Vocals, background vocals
- Slimm Calhoun – Vocals
- Terrence Cash – Engineer
- Theresa Wilson – A&R
- Tibor Zelig – Violin
- Tomi Martin – Guitar
- Tori Alamaze – Background Vocals
- Torkil Gudnason – Photography
- Victor Alexander – Drums
- Vincent Alexander – Assistant, engineer
- Warren Bletcher – Assistant
- Yarda Kettner – Violin
- Zaza – Guitar
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