- O Connor, Tony
- O'Rourke, Miceal
- O-Zone
- ONYX
- ORG Lounge
- Oakenfold, Paul
- Oasis
- Obiat
- Obie Trice
- Obituary
- Obliveon
- Obscene Eulogy
- Obscurcis Romancia
- Obscurity
- Obstinacy
- Obtained Enslavement
- Obtest
- Ocarina
- Occision
- Occult
- Ocean Machine
- Oceans Of Sadness
- Ockeghem, Johannes (1410 - 1497)
- Octavia
- October File
- October Tide
- Odd Project
- Odes Of Ecstasy
- Odessa Philharmonic Orchestra
- Odium
- Odium Immortalis
- Odyssea
- Of A Revolution
- Of The Wand and The Moon
- Offertorium
- Offspring
- Ofra Haza
- Ogdon, John
- Ohm Guru
- Oil!
- Oistrakh, David
- Oka Road
- Old Dead Tree
- Old Funeral
- Old Man Gloom
- Old Man's Child
| - Oldfield, Mike
- Olemus
- Olive
- Oliver Shanti And Friends
- Olivia
- Olympos Mons
- Omega
- Omen
- Omendark
- Omnium Gatherum
- On File
- On Golden Blonde
- On Thorns I Lay
- One Fine Day
- Oneiros
- Only In Dreams
- Oomph!
- Opa Hostil
- Open Hand
- Opera Babes
- Opera IX
- Operation Winter Mist
- Opeth
- Ophiolatry
- Ophthalamia
- Opposition of One
- Opprobrium
- Optimystica Orchestra
- Opus Atlantica
- Orakle
- Orange 9mm
- Orange Juice
- Oratory
- Orb
- Orbis Mundi
- Orbison, Roy
- Orbital
- Orchestral Manoeuvres in the Dark
- Order of the Ebon Hand
- Ordo Equilibrio
- Oreiro, Natalia
- Orff, Carl
- Orgy
- Origin
- Original Cast Recording
- Orion
| - Orion Riders
- Orishas
- Ork
- Orkrist
- Orkus
- Orlando \"Cachaito\" Lopez
- Orodruin
- Orphanage
- Orphaned Land
- Orplid
- Orrico, Stacie
- Osborne, Joan
- Osbourne, Kelly
- Oscar Benton Blues Band
- Oscar Peterson and Ben Webster
- Osirion
- Otep
- Ott
- Ottawan
- Otten, Thomas
- Otyg
- Oubliette
- Our Lady Peace
- Out of Condition
- Out of the Lair
- Outcry
- Outkast
- Outlandish
- Outspoken
- Ouzo
- Overdrive
- Overkill
- Overload
- Overlorde
- Oxiplegatz
- Ozric Tentacles
- Ozzy Osbourne
- Облачный край
- Овсиенко, Татьяна
- Океан Эльзы
- Орбакайте, Кристина
- Органика
- Оргия Праведников
- Осин, Евгений
- Отпетые мошенники
|