Denisea Andrews - background vocals
Jon Asher - vocal producer, background vocals
Jessica Ashley - background vocals
Venus Barr - keyboards, producer
Erik Belz - assistant vocal engineer
Bloodpop - producer
Dan Book - vocal producer
Trevor Brown - background vocals
Burns - engineer, producer
Cashmere Cat - instrumentation, producer, programming
Maddox Chhim - mixing assistant
Brittany Coney - background vocals
John Cranfield - engineer
Alex DeGroot - assistant vocal engineer
Aaron Dobos - vocal engineer
Ed Drewett - background vocals
Jason Evigan - instrumentation, producer, vocal engineer, vocal producer, background vocals
Vanessa Evigan - background vocals
Victoria Evigan - background vocals
Benny Faccone - assistant engineer, assistant vocal engineer
Warren Felder - producer, background vocals
Robin Florent - mixing engineer
Melanie Fontana - background vocals
Ina Forsberg - background vocals
Sterling Fox - guitar, background vocals
Livvi Franc - background vocals
Robin Fredriksson - bass, brass, drums, guitar, handclapping, kalimba, marimba, percussion, producer, programming, snaps, synthesizer, vocal engineer, vocal producer
Michael Freeman - mixing assistant
G-Eazy - rap vocals
Chris Galland - mixing engineer
Serban Ghenea - mixing
Andrew Goldstein - engineer, keyboards, producer, programming
Erwin Gorostiza - creative director
Oscar Görres - bass, guitar, percussion, producer, programming, shaker, snaps, synthesizer, vocal engineer, vocal producer, background vocals
Angella Grossi - background vocals
John Hanes - engineer, mixing engineer
Breyan Isaac - background vocals
Jeff Jackson - mixing engineer
Jermaine Jackson - background vocals
Joe Janiak - background vocals
Kathleen Janzen - background vocals
Jaycen Joshua - mixing
Ilsey Juber - background vocals
Rob Katz - assistant vocal engineer
Ian Kirkpatrick - producer, programming, background vocals
Zaire Koalo - background vocals
Dave Kutch - mastering
Karen Kwak - A&R, executive producer
Mattias Larsson - bass, brass, drums, guitar, handclapping, kalimba, marimba, percussion, producer, programming, snaps, synthesizer, vocal engineer, vocal producer
Marcus Lomax - background vocals
Kevin Luu - assistant engineer, assistant vocal engineer
MadDog - instrumentation, producer, programming
Richard Madenfort - engineer, keyboards, programming, background vocals
Manny Marroquin - mixing
Nathalia Marshall - vocal production assistance
Rick Marty - guitar, mixing, producer
Julia Michaels - background vocals
Mischke - vocal engineer, vocal producer, background vocals
Nick Monson - producer
David Nakaji - mixing assistant
Alex Niceford - producer
Randee St. Nicholas - photography
Jason Patterson - assistant vocal engineer
Phoebe Ryan - background vocals
Linda Pritchard - background vocals
Benjamin Rice - vocal engineer
Talay Riley - background vocals
Robopop - instrumentation, producer, programming
James Royo - engineer
Lance Shipp - podorythmie
Venus Shipp - background vocals, assistant engineer
Dawn Soul - background vocals, programming
Britney Spears - background vocals, lead vocals
Mark "Spike" Stent - mixing
Gavin Taylor - art direction, design
Isaiah Tejada - assistant engineer
Pat Thrall - vocal producer
Carla Marie Williams - background vocals
Tramaine "Youngfyre" Winfrey - producer, background vocals
Sadaharu Yagi - assistant vocal engineer