Artists (Bands) List : 'O'
- O Connor - Olivia - Originoo Gunn Clapazz
- O D B - Olivia Broadfield - Originoo Gunn Clappaz
- O Pioneers!!! - Olivia D'Abo - Orikasa Ai
- O Rappa - Olivia Lewis - Orion The Hunter
- O. Jenkins - Olivia Lufkin - Orion Too
- O.A. Paris - Olivia Newton John - Orions
- O.A.R. - Olivia Newton-John - Orishas
- O.A.R. (Of A Revolution) - Olivia Ong - Orji
- O.C. - Olivia Ruiz - Orkest Klein
- O.C. Smith - Olivia The Band - Orkrist
- O.F.T.B - Olivier Deriviere - Orlando
- O.K. Corral - Ollabelle - Orlando Brown
- O.N.A - Olle LjungströM - Orleans
- O.V. Wright - Ollie Sloan - Ornatos Violeta
- oag - Olsen Brothers - Ornela Vanoni
- Oak - Olsen Twins - Ornella Vanoni
- Oak Ridge Boys, The - Olsson Nigel - Oro Norteño
- Oasis - Olu Dara - Orodruin
- Oathean - Olympos Mons - Orozco Barrientos
- Oatie Paste - Om - Orphan Lily
- Obadiah Parker - Oman Freestyle - Orphanage
- Obie Bermudez - Omar & Rafi - Orphaned Land
- Obie Trice - Omar & The Howlers - Orpheus
- Obituary - Omar A. Rodriguez-Lopez - Orquesta Guayacan
- Oblicity - Omar Alfano - Orquesta La Bohemia
- Oblivion Dust - Omar Haseeb - Orquestra Imperial
- Oblomov - Omar Kami - Orson
- Obrint Pas - Omara Portuondo - Orson Welles
- O'Bryan - Omarion - Orthanc
- Obscura - OMC - Orthodox
- Obscurcis Romancia - Omd - Orthodox Celts
- Observers - Omega - Orup
- Obsessed - Omega Y Su Mambo Violento - O'ryan
- Obsession Indecent - Ominous Grief - Os Mutantes
- Obskure Torture - Omission - Os Paralamas Do Sucesso
- Obtained Enslavement - Omnious Grief - Os Vigaristas
- Oc Smith - Omnium Gatherum - Os Vips
- Occult - Omul Cu Sobolani - Osaka Popstar
- Ocean Blue - On Air Library - Osama Abdel Ghany
- Ocean Colour Scene - On Broken Wings - Osborne Brothers
- Ocean Colours Scene - On My Honor - Osbourne Family Album
- Ocean Drive - On The Last Day - Oscar Brown, Jr.
- Ocean Is Theory - On Thorns I Lay - Oscar Danielsson
- Ocean Ou - On Through The Night - Oscar De La Hoya
- Oceana - ON/OFF - Oscar De León
- Oceanlab - Once - Oscar Del Cerro
- Oceanroyal - Once Nothing - Oscar D'Leon
- Oceans Of Sadness - Onda - Oscar Medina
- Oceans Upon Us - Onda Vaselina - Oscar Morales
- Ochs Phil - Ondskapt - Oscar Peterson Trio
- Ochsner Patent - One Accord - Oscar Toney, Jr.
- O'connor - One Block Radius - Oschino
- Oconnor Hazel - One Buck Short - Ose
- Octavia Sperati - One Chance - Oshitani Saki
- October 31 - One Day As A Lion - Osibisa
- October Nites - One Day Left - Osmond Brothers
- October Project - One Day Life - Osmond Donny
- October Tide - One Dead Three Wounded - O'so Krispie
- Odd Nordstoga - One Dollar Short - Ossastorium
- Odds - One Dove - Ossler
- Odetta - One Eskimo - Ostitto
- Odette Quesada - One King Down - Osvaldo Estrella
- Odio A Botero - One Less Reason - Otep
- Odious Mortem - One Man Army And The Undead Quartet - Other Lives
- Odium - One Man´s Trash - Oti Brown
- Odroerir - One Minute Silence - Otierre
- Odyssea - One More Girl - Otis Clay
- Odyssey - One More Time - Otis Redding
- Of Graves And Gods - One Morning Left - Otis Rush
- Of Infinity - One Nation Crew - Otis Taylor
- Of Machines - One Night Only - Otis Williams And His Charms
- Of Mice And Men - One Of These Days - O-Town
- Of Montreal - One Republic - Otto Ohm
- Of No Avail - One Session - Oudaden
- Of The Pillar - One Tree Hill - Oum Kalthoum
- Ofer - One Voice - Our False Heroes
- Ofermod - One Way - Our Hearts Hero
- Off Topic - One Way System - Our Heart's Hero
- Off With Their Heads - One Way Traffic - Our Lady Peace
- Offenbach - One World Project - Our Last Desire
- Offer Nissim - One.Be.Lo - Our Last Goodbye
- Offertorium - One-21 - Our Last Night
- Office - o'Neal McKnight - Ouran Koukou Host Club
- Office Of Strategic Influence - One-Eyed Doll - Ourkast
- Office Of Strategic Influence (O.S.I.) - One-Way Mirror - Ourlastbreath
- Officer Negative - Onmyouza - Ours
- Official Kardinal - Ono - Out Of Eden
- Officium Triste - Onyx - Out Of Sight
- Offlaga Disco Pax - Onze - Out Of The Grey
- Offspring - Oobie - Outbox
- Oficina G3 - Ookla The Mok - Outcast Youth
- Ofra Haza - Oomori Kinuko - Outer Limits
- Often Sick - Oomp Camp - Outerspace
- Ogan Aydin - Oomph! - Outfield
- Ogata Megumi - Opalo - Outhere Brothers
- Ogie Alcasid - Open Hand - Outkast
- Ognjen Vuletic - Operation Ivy - Outlandish
- Ogre Battle - Operator - Outlaws
- Oh Brother Where Art Thou - Operator Please - Outlawz
- Oh Laura - Opeth - Outworld
- Oh No, Please! - Ophis - Ove Stoylen
- Oh Susanna - Opiate For The Masses - Oveja Negra
- Oh Sweet Ransom - Opick - Over It
- Oh The Blood - Opihi Pickers - Over The Edge
- Oh, Apollo! - Opio - Over The Hills
- Oh, Atoms - Opm - Over The Rhine
- Oh, Hush! - Opshop - Overbass
- Oh, Sleeper - Optiganally Yours - Overcast
- Ohgr - Optimo - Overcome
- Ohguro Maki - O'questrada - Overdose
- Ohio Express - Orakle - Overdream
- Ohio Players - Oral Bee - Overflash
- Ohkura Tadayoshi - Oran Juice - Overflow
- Ohmega Watts - Orange And Lemons - Overglow
- Oi Va Voi - Orange Range - Overground
- Oingo Boingo - Orange Sky - Overhead
- OJ Da Juiceman - Oratorio - Overkill
- OJ Mariano - Orbital - Overkill Urge
- Ojedita - Orchestral Manoeuvres In The Dark - Overlife
- Ojos De Brujo - Orchid - Overlorde
- Ok Go - Ordalium - Overnite
- O'Kaysions - Order Of The Ebon Hand - Overseer
- Okina Reika - Ordo Equilibrio - Oversoul
- Okkervil River - Ordo Rosarius Equilibrio - Overstreet Paul
- Oksana Angel - Ore No Ska Band - Overthrow
- Okuda Miwako - Ore Ska Band - Overtones Rustic
- Okumura Hatsune - Oren Lavie - Overview
- Ol' Dirty Bastard - Orenda Fink - Owen
- Ol' Skool - Orfeh - Owen Bradley Quintet
- Ola - Organic Critters - Owen Mark
- Ola Svensson - Organic Infest - Owen Wilson
- Olavi Uusivirta - Organic Revolution Orchestra - Owl City
- Old & In The Way - Organism 12 - Owls
- Old 97s - Organized Konfusion - Owsley
- Old 97's - Orgy - Oxa
- Old And In The Gray - Orient Pearl - Oxide & Neutrino
- Old Boy Network - Orietta Berti - Oxmo Puccino
- Old Crow Medicine Show - Origa - Oxymoron
- Old Man's Child - Origin - Oystein Sunde
- Old Roger - Original - Oyster Band
- Old School Players - Original 3 - Oyster Prairie
- Oleander - Original Banda El Limon - Oysterhead
- Oleta Adams - Original Broadway Cast - Ozark Henry
- Olga Tanon - Original Cast - Ozma
- Olimpo Cárdenas - Original Cast Recording - Ozomatli
- Olive - Original Naabtal Duo - O-Zone
- Oliver - Original Nashville Cast - Ozzy Osbourne
- Oliver James Iii