- Ouinsou Corneille
- Ouizzz
- Oukaci
- Oulan Oude Choir
- Oulao Taha Emile
- Oulare, Alpha & Sugé
- Oulaya
- $oulcat
- $oulcat
- Oulchenowski
- Ouled Ben Aguida
- Ouled Bombara
- Ouled Bouazaoui
- Ouled Cheikh Mohand
- Ouled El Farcha
- Ouled Gaboudiah
- Ouled Jouini
- Ouled Jouini
- Oulfa
- Oulu Hotshots
- Oulu Symphony Orchestra
- oulunkylän big band
- oulunkylän big band
- Ouly Zoo
- Oum
- Oum Algheit
- Oum Kalsoum
- Oum Kalsoum
- Oum Kalthoum
- Oum Kaltsoum
- Oum' Kardoh