- Demi Lovato — composer, piano, vocals
- Tommy Barbarella — organ, keyboards
- Michael Bland — drums
- Devin Bronson — guitar, soloist
- Ken Chastain — percussion, programming
- Dorian Crozier — drums
- Eddie DeLaGarza — management
- Kara DioGuardi — composer, vocals
- Andy Dodd — composer
- John Fields — bass, guitar, composer, keyboard, programming, producer, engineer
- Joe Jonas — composer, vocals, producer
- Kevin Jonas II — guitar, vocals, composer, producer
- Nick Jonas — vocals, guitar, drums, percussion, keyboards, piano, composer, producer
- Nik Karpen — assistant
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- Jack Lawless — drums
- Jon Lind — A&R
- Chris Lord-Alge — mixing
- Stephen Lu — keyboards, string arrangement
- Sheryl Nields — photography
- Will Owsley — guitar, vocals
- Tim Pierce — guitar
- Jason Reeves — composer
- Daniel Rojas — guitar
- Robert Schwartzman — compose, vocals
- Dave Snow — creative director
- Gavin Taylor — art direction, design
- John Taylor — guitar, vocals
- Adam Watts — composer
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