- Dianna Agron – lead vocals (1-2, 4)
- Adam Anders – music arranger, vocal arranger, digital editing, producer, soundtrack producer, additional background vocals
- Alex Anders - engineer, digital editing, additional vocal producer, additional background vocals
- Nikki Anders - additional background vocals
- Peer Åström – music arranger, producer, engineer, mixing
- Kala Balch - additional background vocals
- Emily Benford - additional background vocals
- Joshua Blanchard - assistant engineer
- RaVaughn Brown - additional background vocals
- Geoff Bywater – executive in charge of music
- Deyder Cintron - assistant engineer, digital editing, additional background vocals
- Chris Colfer – lead vocals (4, 7)
- Kamari Copeland - additional background vocals
- Darren Criss – lead vocals
- Tim Davis - vocal contractor, additional background vocals
- Tommy Denander - guitars[6]
- Dante Di Loreto – executive producer
- Henrik Edenhed - mixing
- Luke Edgemon - additional background vocals
- Brad Falchuk – executive producer
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- Ryan Gillmor - assistant engineer
- Missi Hale - additional background vocals
- Fredrik Jansson - assistant engineer
- Storm Lee - additional background vocals
- David Loucks - additional background vocals
- Lea Michele – lead vocals (1, 3-4, 6, 8, 10, 13)
- Cory Monteith – lead vocals (1, 4, 8-11, 13)
- Matthew Morrison – lead vocals (12)
- Ryan Murphy – producer, soundtrack producer
- Jeanette Olsson - additional background vocals
- Chord Overstreet – lead vocals (1, 8, 13)
- Tiffany Palmer - additional background vocals
- Martin Persson - music programming
- Ryan Petersen – assistant engineer
- Zac Poor - additional background vocals
- Nicole Ray - production coordinator
- Amber Riley – lead vocals (1-2, 8, 13)
- Naya Rivera – lead vocals (1-2, 4)
- Mark Salling – lead vocals (4-5, 11)
- Drew Ryan Scott - additional background vocals
- Onitsha Shaw - additional background vocals
- Jenna Ushkowitz – lead vocals (2)
- Windy Wagner - additional background vocals
- Joe Wohlmuth - assistant engineer
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