- Dianna Agron - lead vocals (8, 10, 14, 18)
- Adam Anders - record producer, recording engineer, music & vocal arranger, additional background vocals (1-11, 13–18)
- Alex Anders - recording engineer (1-11, 13–18)
- Nikki Anders - additional background vocals (1-11, 13–18)
- Peer Astrom - music arranger, record producer, recording engineer, audio mixing (1-11, 13–18)
- Kala Balch – additional background vocals (1-11, 13–18)
- Colin Benward – additional background vocals (1-11, 13–18)
- Dave Bett – art direction
- PJ Bloom – music supervisor
- Ed Boyer – music arranger, vocal arranger, additional recording engineer (12)
- Ravaughn Brown – additional background vocals (1-11, 13–18)
- Geoff Bywater – executive in charge of music
- Sam Cantor – background vocals (12)
- Josh Cheuse – art direction
- Deyder Cintron – assistant recording engineer, digital editing (1-11, 13–18)
- Chris Colfer – lead vocals (7-8)
- Kamari Copeland – additional background vocals (1-11, 13–18)
- Darren Criss – lead vocals (12)
- Tim Davis – additional vocal arrangement, vocal contractor, additional background vocals (1-11, 13–18)
- Dante Di Loreto – soundtrack executive producer
- Brad Falchuk – soundtrack executive producer
- Tommy Faragher – record producer (12)
- Conor Flynn – background vocals (12)
- Michael Grant – background vocals (12)
- Heather Guibert – coordination
- Missi Hale – additional background vocals (1-11, 13–18)
- Jon Hall – additional background vocals (1-11, 13–18)
- Samantha Jade – additional background vocals (1-11, 13–18)
- Tobias Kampe-Flygare – assistant recording engineer (1-11, 13–18)
- Charlie Kramsky – assistant recording engineer (12)
- John Kwon – background vocals (12)
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- Storm Lee – additional background vocals (1-11, 13–18)
- David Loucks – additional background vocals (1-11, 13–18)
- Meaghan Lyons – coordination
- Cailin Mackenzie – background vocals (12)
- Dominick Maita – mastering
- Kent McCann – background vocals (12)
- Kevin McHale – lead vocals (1-2, 4, 11, 13–14)
- Lea Michele – lead vocals (5-6, 8, 14)
- Cory Monteith – lead vocals (1-2, 4, 8, 14, 16)
- Heather Morris – lead vocals (3, 5, 14)
- Matthew Morrison – lead vocals (5, 15)
- Eric Morrissey – background vocals (12)
- Ryan Murphy – record producer (1-11, 13–18), soundtrack producer
- Jeanette Olsson – additional background vocals (1-11, 13–18)
- Chord Overstreet – lead vocals (2, 10, 14, 18)
- Gwyneth Paltrow - lead vocals (13)
- Martin Persson – additional music arranger, orchestration, music programming (1-11, 13–18)
- Stefan Persson – additional horn arranger (1-11, 13–18)
- Zac Poor – additional background vocals (1-11, 13–18)
- Evan Powell – background vocals (12)
- Nicole Ray – production coordination
- Amber Riley – lead vocals (1, 8–9, 13)
- Naya Rivera – lead vocals (1, 3, 9, 17)
- Penn Rosen – background vocals (12)
- Mark Salling – lead vocals (1-2, 4, 11)
- Drew Ryan Scott – additional background vocals (1-11, 13–18)
- Eli Seidman – background vocals (12)
- Onitsha Shaw – additional background vocals (1-11, 13–18)
- Harry Shum Jr. - lead vocals (14)
- Jenny Sinclair – coordination
- Bryan Smith – recording engineer, audio mixing (12)
- Robert Smith – recording engineer (12)
- Sally Stevens – additional music arranger, additional vocal arranger, vocal contractor (12)
- Jack Thomas – background vocals (12)
- Kerstin Thörn – additional string arranger (1-11, 13–18)
- Jenna Ushkowitz – lead vocals (8, 14)
- Windy Wagner – additional background vocals (1-11, 13–18)
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