- Circanow -- Circus Maximus
- Circus Mayhem -- Citara Trio
- Citations -- City of Birmingham Symphony Chorus
- City of Birmingham Symphony Orchestra -- CJ Butler
- CJ C -- Claes Crona
- Claes Erikkson -- Clairseach
- Clairvoyance -- Clara Morgane
- Clara Morgane -- Clarence "Guitar" Sims
- Clarence H. Wyatt -- Clark Gault
- Clark Gayton -- Classic Music Studio Orchestra
- Classic Music Studio Orchestra -- Claude Kelly
- Claude Knott -- Claudia & Alexx
- Cláudia Amorim -- Claudia Barainsky