Featuring
Benjamin Adamson on trumpet
Carlos Sosa on flute, sax (baritone), sax (tenor)
Colbie Caillat on vocals
Dane Venable on product manager
David Angel on violin
David Angell on violin
David Davidson on violin, string arrangements
Fernie "Maddog" Castillo on trumpet, flugelhorn
Jason Mraz on guitar, vocals
John Catchings on cello
Jon Hall on choir, chorus
Karl Brazil on drums
Keith Nichols on cello
Kieran McGuinness on choir, chorus
Kristin Wilkinson on viola
Kristoffer Sonne on drums
Lauren DeRose on vocals (background)
Luke Potashnick on guitar
Martin Terefe on bass, guitar, choir, chorus, piano
Pete Ibsen on choir, chorus
Sacha Skarbek on piano
Savanna Electra Sparkes on choir, chorus
Tanya Murphy on choir, chorus

Produced By
Eric Hinojosa
Josh Deutsch (executive)
Kevin Kadish
Steve Lillywhite

Featuring
Ahmir Khalib Thompson on drums
Amanda Stitzer on choir, chorus
Bashiri Johnson on percussion
Bill Bell on guitar, vocals (background)
Brandan Charles Jenkins on choir, chorus
Brandon Tate on choir, chorus
Charlie Mingroni on voices
Christopher Mantlo on choir, chorus
Clinton Roane on choir, chorus
Dane Venable on product manager
Daniel Adendorff on choir, chorus
David Zwarg on videography
Diana DeLaCerda on videography
DJ Bob Necksnapp on scratching
Elizabeth Rowe on choir, chorus
Eric Hinojosa on keyboards, vocals (background)
Eric Simpson on choir, chorus
Ian Sheridan on bass, string arrangements, vocals (background)
Jack Daley on bass
Jason Mraz on guitar (acoustic), guitar, vocals, guitar (electric)
Jeremy Tozler on choir, chorus
Jonathan Mathews on choir, chorus
Josh Deutsch on castanets
Kara Lusk on choir, chorus
Karl Perazzo on percussion, timbales
Kasey Underdown on choir, chorus
Kelsey Lee Farmer on choir, chorus
Kevin Kadish on guitar (acoustic), soundscape
Lauren Baar on choir, chorus
Lyle Workman on dobro, guitar (electric), guitar
Megan Dean on choir, chorus
Mike Elizondo on bass
Nicole Bayer on cello
Nir Z. on drums
Noel "Toca" Rivera on vocals (background)
Patricia Cancro on choir, chorus
Peter Harding on videography
Rachael Yamagata on vocals, vocals (background)
Raul Midón on guitar (acoustic), vocals (background), guitar (electric)
Raul Rekow on percussion, conga
Rebecca Cheatham on choir, chorus
Robbie Eastman on choir, chorus
Roger Joseph Manning Jr. on keyboards, moog bass
Sarah Ellett on choir, chorus
Teresa Polyak on videography
Tracy Calton on choir, chorus
Wendy Robinson on videography
Whitney Robinson on choir, chorus

Engineered By
Carl Glanville
Matthew Cullen (assistant)
Samuel "Vaughan" Merrick

Featuring
Ben Wendel on saxophone
Dane Venable on product manager
Dawn Brocco on make-up, hair stylist
Greg Kurstin on organ, piano (electric), synthesizer, fender rhodes, clavinet, piano
Hesta Prynn on vocals (background)
Jason Mraz on guitar (acoustic), vocals, vocals (background)
John Alagía on guitar (electric), organ (hammond), tambourine, shaker, wurlitzer, tracking
Michael Andrews on guitar (acoustic), lap steel guitar, horn arrangements, slide guitar, mellotron, ukulele, guitar (electric), celeste, banjo
Scot Ray on trombone
Shane Endsley on trumpet
Stewart Myers on bass