O
- 2 O-Zone
- 2 Oag
- 2 Oar
- 2 Oasis
- 2 Obituary
- 2 Ocean Colour Scene
- 2 Ochs Phil
- 2 Offspring
- 2 Old Mans Child
- 2 Oldfield Mike
- 2 Oleander
- 2 One Dollar Short
- 2 One Minute Silence
- 2 Onesidezero
- 2 Operation Ivy
- 2 Opeth
- 2 Orbison Roy
- 2 Orgy
- 2 Osborne Joan
- 2 Osbourne Kelly
- 2 Osbourne Ozzy
- 2 Our Lady Peace
- 2 Ours
- 2 Outkast
- 2 Outlaws
- 2 Over Kill
- 2 Ozma
- 2 Ozzy Osbourne
