- Otra Cara
- Otra Nota
- Otra Salida
- Otra-Cosa
- Otro Nivel
- Otros Aires
- Otros Senti2
- Ottawan
- Otto & Nando
- Otto de la Rocha
- Otto Dix
- Otto Serge
- Otyg
- Oublie-One
- Ougenweide
- Oum Kalthoum
- Our Innocence Lost
- Our Lady Peace
- Our Last Night
- Ouran High School Host Club
- Ours
- Out Of Eden
- Out Of Hand
- Out of Line
- Out Of The Ordinary
- Out Of Your Mouth
- Out Reazon
- Out School
- Outasight
- Outblast
- Outfield
- Outhere Brothers
- Outkast
- Outkast Featuring B-Real
- Outkast Featuring Big Rube, Sl
- Outkast Featuring C-Bone, Slim
- Outkast Featuring Cee-Lo Goodi
- Outkast Featuring Eco & Gangst
- Outkast Featuring Erykah Badu
- Outkast Featuring Khujo (Goodi
- Outkast Featuring Killer Mike
- Outlandish
- Outlaw
- Outlaws
- Outlawz
- Outlawz Featuring Akwylah, Smo
- Outlawz Featuring Bad Azz, Low
- Outlawz Featuring Daz Dillinge
- Outsiderz 4 Life
- Outspoken