O   | O | O Fracas |
| O Level | O Rodney & Cooley Joe | O Suilleabhain, Micheal |
| O Toole, Peter | O Yuki Conjugate | O'Banion, John |
| O'Brien, Conan | O'Brien, Deke | O'Brien, Dermot |
| O'Brien, Erin | O'Brien, Hod | O'Brien, Michael |
| O'Brien, Tim | O'Brien-Docker, Ian | O'Brien-Docker, John |
| O'Bryan | O'Bryant's Washboard Wonders | O'Casey, R. |
| O'Casey, Sean | O'Connell, Helen | O'Connell, Maura |
| O'Connor, Cavan | O'Connor, Des | O'Connor, Hazel |
| O'Connor, Kathie | O'Connor, Sinead | O'Connor, Tom |
| O'Cuthbert, Martin | O'Day, Alan | O'Day, Anita |
| O'Donnell Roger | O'Donnell, Al | O'Donnell, Alison |
| O'Donnell, Daniel | O'Donnell, Eugene | O'Donnell, Joe |
| O'Donnell, Rosie | O'Dowd, Barry | O'Dowda, Brendan |
| O'Duffy, Michael | O'Farrill, Chico | O'Flynn, Liam |
| O'Gwynn, James | O'Hagan, Sean | O'Halloran Brothers, The |
| O'Hara, John | O'Hara, Mary | O'Hara, Mary Margaret |
| O'Hara, Maureen | O'Hearn Patrick | O'Jays, The |
| O'Kane, John | O'Kanes, The | O'Kaysions, The |
| O'Keefe, Danny | O'Keefe, Johnny | O'Keefe, Peggy |
| O'Leary, Johnny | O'List, David | O'Malley, Stephen |
| O'Meara, Jo | O'Neal, Alexander | O'Neal, Johnny |
| O'Neal, Shaquille | O'Neil, Sandy | O'Riordan, Dolores |
| O'Rouke, Jim | O'Rourke, Declan | O'Rourke, Jim |
| O'Sullivan, Bernard | O'Sullivan, Daniel | O'Sullivan, Gilbert |
| O, Karen | O, Rob | O-Town |
| O. | O. J. Abbott | O. P. Nayyar |
| O.A.R (Of A Revolution) | O.C Roberts | O.C. |
| O.Children | O.D, Adrenalin | O.G.C. |
| O.M.D. | O.T. Quartet | O.T.T |
| O.W.L. | Oak | Oak Ridge Boys, The |
| Oakenfull, Ski | Oakenshield | Oakey & Moroder |
| Oakley, Gee | Oaktown's 3-5-7 | Oasis (Dutch) |
| Oasis (Mary Hopkin) | Oasis (UK) | Oasis (US) |
| Oates John | Oates, Jackie | Oath, The |
| Oathbreaker | Oats, Wild | Oattes Van Schaik |
| Obassey, Patty | Obel, Agnes | Obelisk |
| Oberhofer | Oberlin, Russell | Obernik, Sam |
| Oberon | Oberst, Conor | Obey The Brave |
| Obey, Ebenezer | Obey, Trust | OBF |
| Obi | Obi, Ras | Obie Trice |
| Obituary | Objayda | Objekt |
| Obliveon | Obraztsova, Elena | Obscura |
| Obsequiae | Obsession | Obus |
| Ocasek, Ric | Occasion, The | Occasional Few, The |
| Occasional Five, The | Occasional Project, The | Occasionally David |
| Occult Burial | Ocean | Ocean (Modern Soul) |
| Ocean Colour Scene | Ocean Grove | Ocean Party, The |
| Ocean, Billy | Ocean, Humphrey | Oceanic |
| Oceano | Oceans Ate Alaska | Oceans Of Slumber |
| Oceansize | Ochil Players, The | Ochs, Phil |
| Ockeghem, Johannes | Octa, Octo | Octagon Man, The |
| Octave One | Octavia | Octavian |
| October Country | October Tide | October, Gene |
| Octopus | Octopus Syng | Octotron, Dr |
| Oculus | Odd Man Out | Oddie, Bill |
| Odds & Ends | Odell, Tom | Odesza |
| Odetta | Odin | Odnoposoff, Ricardo |
| Odrich, Ron | Odyssey | Odyssey |
| Odyssey, The | Of Arrowe Hill | Of Feather And Bone |
| Of Mice & Men | Of Monsters And Men | Of Montreal |
| Ofarim, Esther | Ofege | Off |
| Off The Wall | Off With Their Heads | OFF! |
| Off, Half | Off-Shore | Offenbach (Rock) |
| Offenbach, Jacques | Offenders, The | Offhooks, The |
| Official Secrets, The | Offshore | Offspring |
| Ofshore | Ofwerman, Rune | Ogan, Gary & Lamb, Bill |
| Ogawa, Yusuke | Ogdens, The | Ogdon, John |
| Ogdon, John & Lucas, Brenda | Ogerman, Claus | Ogermann, Claus |
| Oggum | Ogre, Meaty | Ogunde, Hubert |
| Ogura, Kei | Oh No | Oh No Ono |
| Oh Ok | Oh Well | Oh Wonder |
| Oh! Polo | Oh' Dev | Oh, Atoms |
| Oh, Nadia | Ohashi, Junko | ohGr |
| OHGR WELT | Ohhms | Ohi Ho Bang Bang |
| Ohio Express | Ohio Players | Ohlsson, Garrick |
| OHM | Ohno, Shunzo | Ohno, Yuji |
| Ohnuki, Taeko | Ohrn, Josefin + The Liberation | Ohtani, Kazuo |
| Oi Polloi | Oil Seed Rape | Oingo Boingo |
| OISIN | Oïstrakh & Rostropovitch | Oïstrakh, David |
| Oïstrakh, David & Igor | Oïstrakh, Igor | Oizone |
| Ojo, Dele | OK Go | OK Jive |
| Okay Temiz | Okereke, Kele | Okino, Shuya |
| Okino, Yoshihiro | Okkervil River | Okkultokrati |
| Okosun, Sonny | Oktagon | Okumoto, Ryo |
| Ol Dirty Bastard | Ola | Oladimeji & His Talking Drum |
| Olatunji, Babatunde | Olausson, Jakob | Olavide, Begoña |
| Olay, Ruth | OLD | Old And In The Way |
| Old Crow Medicine Show | Old Fashioned Love | Old Gods Of Asgard |
| Old Gold | Old Man Gloom | Old Man River |
| Old Metropolitan Band | Old Mole Band, The | Old Pete & John Christie |
| Old Skool Orchestra | Old Skull | Old Swan Band, The |
| Oldfield, Harry | Oldfield, Mike | Oldfield, Natasha |
| Oldfield, Sally | Oldfield, Terry | Oldham Tinkers, The |
| Oldham, Andrew Loog | Oldham, Will | Oldland Montano |
| Oldland, Misty | Ole Ole | Oleander |
| Olenn, Johnny | Olevsky, Julian | Oli Max & D.J. Shapps |
| Oli.P | Olive | Olive Juice |
| Olive, Brian | Olivelawn | Oliver |
| Oliver Books calendars | Oliver Dawson Saxon | Oliver Naylor's Seven Aces |
| Oliver, David | Oliver, Frankie | Oliver, Graham |
| Oliver, King | Oliver, Mickey | Oliver, Mondeé |
| Oliver, Sy | Oliveri, Nick | Olivia De Havilland |
| Olivia Tremor Control, The | Olivier, Laurence | Olivor, Jane |
| Ollie & Jerry | Olney, Dave | Olney, David |
| OLO Worms | Olsen, Angel | Olsen, George |
| Olsher, Lesley | Olson, Mark | Olsson, Kai |
| Olsson, Mats And His Orchestra | Olympia Dukakis | Olympic Bouzouki Group, The |
| Olympic Lifts | Olympic Runners | Olympic World |
| Olympics, The | Om | Omar |
| Omar And The Howlers | Omarion | Omartian, Michael |
| Omartian, Michael And Stormie | OMC | Omega |
| Omega Amoeba | Omega Tribe | Omegavortex |
| Omen | Omen III | Omen, Macabre |
| Omerta | Omi, Sonik | Omit |
| Omni | Omni Trio | Omnium Gatherum |
| Omori, Hinako | Omowura, Ayinla | Omsk Russian Ensemble, The |
| Omura, Kenji | On 1 Crew | On And Ons, The |
| On Offs, The | On Our Own Clock | On Parole |
| On The Air | On The One | On The Seventh Day |
| On The Speakers | On Trial | On/Off |
| Once & Future Band | Once Again | Once Blue |
| Once Human | Onda Del Futuro | Ondatrópica |
| Ondolo, John | Ondskapt | One |
| One [AOR] | One 2 Many | One AM Radio, The |
| One Blood | One Car Pile-Up | One Day As A Lion |
| One Dove | One God Universe | One Hand One Heart |
| One Hundred Ton And A Feather | One Hundred Words For Snow | One II One |
| One In A Million | One Lady Owner | One Minute Silence |
| One More Time | One Nation | One Night Only |
| One O'Clock Gang | One The Juggler | One Thousand Violins |
| One Three, The | One To One | One Trive |
| One True Voice | One Way System | One Way Ticket |
| One Word | One, Act | One, Arkestra |
| One, As | One, Bold | One, Para |
| One-Eyed Jack | One-Eyed Jacks | OneDa |
| Oneida | Onelinedrawing | Oneness Of Juju |
| Oneohtrix Point Never | OneRepublic | Ones, The |
| OneTwo | Ong, Olivia | Onionhead |
| Only Child | Only If You Call Me Jonathan | Only Lonely |
| Only Ones | Only Real | Only, Jerry |
| Ono, Kim | Ono, Seigen | Ono, Yoko |
| Onom Agemo & The Disco Jumpers | Onono, Ben | Onset, The |
| Onslaught | Onuora, Oku | Onward International |
| Onwenu, Onyeka | Onyeabor, William | Onyeka The Torch |
| Onyx | Onyx, The | Ooberman |
| Oomph | Oosterhuis, Trijntje | Oozay |
| Oozing Wound | Opa | Opal |
| Opal Butterfly | Opaz | OPE |
| Opel, Jackie | Open Book | Open Hand |
| Open In Obscurity | Open Mike Eagle | Open Mind, The |
| Open Road | Open Sky | Open, The |
| Operahouse | Operation Ivy | Operator Please |
| Operators, The | Opeth | Ophthalamia |
| Opium Lord | OPM | OPM (Disco) |
| Oporto | Opossom | Oppenheimer |
| Opposition | Opsahl & Lindstedt | Optic Eye |
| Optic Nerve, The | Optimist Club | Optimistas, Los |
| Optimum Wound Profile | Optimystic | Opus |
| Opus '88 | Opus [Rock] | Opus Dead |
| Opus III | Opus Int Music Ltd | Or-N-More |
| Ora | Ora, Rita | Orabge |
| Oraisòn, Jorge | Oral | Oral Exciters, The |
| Oram, Daphne | Orange (Shoegaze) | Orange Alabaster Mushroom, The |
| Orange And Blue | Orange Bicycle, The | Orange Blossom Sound |
| Orange Can | Orange Deluxe | Orange Goblin |
| Orange Juice | Orange Lights, The | Orange Peel |
| Orange Power | Orange, Mandolin | Orange, Richard |
| Oranger | Orans | Oranssi Pazuzu |
| ORB | Orb | Orb, Alice's |
| Orbidöig | Orbison, Joy | Orbison, Roy |
| Orbit, William | Orbital | Orbo Equitum Solis |
| Orca | Orcas | Orch. Of The Amsterdam Phil. |
| Orchard, Marble | Orchard, Pat | Orchestra Baobab |
| Orchestra Filarmonica Di Roma | Orchestra Folklore Di Romagna | Orchestra Luna |
| Orchestra Makassy | Orchestra Of Skin & Bone | Orchestra Of St. James, The |
| Orchestra Of The Opera-Comique | Orchestra Tango Cafe | Orchestra, Apocalypse |
| Orchestra, Cardboard | Orchestra, Dadavistic | Orchestra, Hidden |
| Orchestra, Peace | Orchestra, Sauter-Finegan | Orchestre De L'Association |
| Orchestre De L'O.R.T.F. | Orchestre De La Suisse Romande | Orchestre De Monte Carlo |
| Orchestre De Paris | Orchestre Eddie Roger | Orchestre Jazira |
| Orchestre T.P.O.K. Jazz | Orchid | Orchid (DOOM) |
| Orchids (60S), The | Orchids (Rock), The | Orchids, The |
| Orcustus | Ordeal, DJ | Order Of Apollyon, The |
| Order, Bogus | Order, Natural | Order, Outlaw |
| Ordinary Boys, The | Ordinary Man | Ordination Of Aaron |
| Oregon | Orellana, Raúl | Oren, Peter |
| Orexis | Orff, Carl | Orford, Martin |
| Organ, M. | Organ, The | Organisation |
| Organisms | Organization | Organized Konfusion |
| Organum | Orgazmo | Orgone Box |
| Orgy | Orianthi | Orielle |
| Orielles, The | Orient Express | Oriental Wind |
| Origami Angel | Origin | Origin Unknown |
| Origin, The | Original Bedroom Rockers | Original Brasso Band, The |
| Original Cast Recording | Original Concept | Original Dixieland Jazz Band |
| Original DJ Vibes | Original Mirrors | Original Sound Track, The |
| Original Soundtrack | Original Surfaris | Original Trinidad Steel Band |
| Original Tuxedo Jazz Band, The | Original, The | Originals, The |
| Orioles, Felders | Orioles, The | Orion (Elvis) |
| Orion (Ryan Adams) | Orion The Hunter | Orkest, Metropole |
| Orkestra | Orla Wren | Orlando (60s) |
| Orlando (90s) | Orlando Johnson & Trance | Orlando Quartet |
| Orlando, Tony & Dawn | Orleans | Orleans, Ela |
| Orlons, The | Orme, Le | Ormonde Folk, The |
| Ornadel, Cyril | Ornament | Ornamental |
| Oroonies, The | Orozco, Rafael | Orphan |
| Orphan Egg | Orpheus | Orphic Soop |
| Orquesta De Antonio Bustamante | Orquesta Española De Baile | Orquesta La Justicia |
| Orquesta La Solución | Orquesta Tipica Union Sanluise | Orquestra Casino De Sevilla |
| Orquestra Sinfônica Brasileira | Orr, Benjamin | Orr, Buxton |
| Orr, Michael | Orrall, Robert Ellis | Orrico, Stacie |
| ORS | Orson | Orson Family, The |
| Ortega, Jeannie | Ortega, Lindi | Orthodox |
| Ortiz, Cristina | Ortolani, Riz | Orton, Beth |
| Orwell, Paul | Orwells, The | Ory, Kid |
| Ory,Kid And Allen, Red | Oryema, Geoffrey | Orzabal, Roland |
| Os Brasileiros | Os Caretas | Os Diagonais |
| OS Mutantes | Os Originais Do Samba | Osa, Sigbjørn Bernhoft |
| Osanna | Osborne & Giles | Osborne Brothers, The |
| Osborne, Jeffrey | Osborne, Joan | Osborne, Mike |
| Osborne, Mike & Tracey, Stan | Osborne, Paul | Osborne, Tony |
| Osbourne, Johnny | Osbourne, Ozzy | Osby, Greg |
| Oscar | Oscar & Eugene Wright | Oscar D' León |
| Oscar Peterson & Milt Jackson | Oscillation, The | Ose |
| OSH | Oshik Levy & Naftaly Alter | OSI |
| Osiah | Osibisa | Osipov Academic Russian Folk O |
| Osiris (Funk) | Osiris (Prog) | Oskar, Lee |
| Oslin, K.T. | Oslo Philharmonic Orchestra | Osmond Boys |
| Osmond, Donny | Osmond, Jimmy | Osmond, Marie |
| Osmonds, The | Osmosis | Oso, Oso |
| Osorio, Jorge Federico | Ossian | Ossie & The Upsetters |
| Ossie Layne Show, The | Osterman Weekend, The | Ostrogoth |
| Osunlade | Osymyso | Otep |
| Other Half | Other Half, The | Other Ones (80S), The |
| Other Ones, The | Other People | Other Two, The |
| OTHERLiiNE | Othermothers, The | Others [1960S], The |
| Otherwise | Otis & The King Pins | Otis Johnny |
| Otis Williams And His Charms | Otis Williams And The Midnight Cowboys | Otis, Byron |
| Otis, Ed & Ben | Otis, Shuggie | Ottawan |
| Ottewell, Ben | OTTO | Otway & Barrett |
| Otway John | Ou Est Le Swimming Pool | Ouch |
| Ought | Oui 3 | Ouida & The Numbers |
| Ounsworth, Alec | Our American Cousins | Our Broken Garden |
| Our Daughters Wedding | Our Favourite Band | Our Future Feelings |
| Our Girl | Our Heaven | Our Hollow Our Home |
| Our Kid | Our Lady Peace | Our Lunar Activities |
| Our Tribe | Ousset, Cécile | Out Cold |
| Out For Justice | Out Hud | Out Lines |
| Out Of Darkness | Out Of My Hair | Out Of The Blue |
| Out Of Your Mouth | Out On Blue Six | Out With A Bang! |
| Out With Mummy | Out, Papercut | Out, The |
| Out-Phaze | Outburst | Outcasts |
| Outcry Collective | Outer Limits | Outer Limits, The |
| Outfield | Outhere Brothers, The | Outkast |
| Outlander | Outlandish | Outlaw Blues Band, The |
| Outlaw, Sam | Outlaws, The (Country) | Outlaws, The (UK) |
| Outlaws, The (US) | Outline, The | Outloud |
| Outnumbered, The | Outo | Outpatience, The |
| Outrage | Outrider | Outside |
| Outsiders (Punk), The | Outsiders, The | Outsiders, The |
| Outsiders, The | Outsiders, The (US) | Outskirts Of Infinity |
| Outskirts, The | Ov Sulfur | Ova |
| Oval | Ovary Lodge | Overall, Kassa |
| Overdraft, The | Overexposure | Overkill |
| Overlanders, The | Overload | Overload, Honcho |
| Overload, Shifty | Overlord | Overlord (Punk) |
| Overlord X | Overlords, The | Overmono |
| Override | Overstreet, Tommy | Overtones, The |
| Owen | Owen And Leon | Owen, Dylan |
| Owen, Mark | Owen, Michael | Owen, Nelson |
| Owen, Ray | Owen, Reg | Owen, Sid & Patty Palmer |
| Owens, Buck | Owens, Buck & Raye, Susan | Owens, Frank |
| Owens, Jack | Owens, Jamie | Owens, Jimmy |
| Owens, Robert | Owens, Tim 'Ripper' | Owens, Tony |
| Owl & Mouse | Owl Service, The | Owls |
| Owls, Fewer | Owston, Chuck | Ox Scapula |
| Oxbow | Oxfam Glamour Models | Oxford Nights, The |
| Oxford, Vernon | Oxide Neutrino | Oxley, Louie |
| Oxley, Tony | OXO | Oxxo Xoox |
| Oxy And The Morons | Oxygen Destroyer | Oxym |
| Oyster Band, The | Oysterband | Oysterhead |
| Oyuugi Wagamama Dan X PaRADEiS | OZ Magazine | Ozan, Mehmet |
| Ozark Mountain Daredevils, The | Ozo | Ozomatli |
| Ozone | Ozone, Makoto | Ozric Tentacles |
| Ozu, Masahiko | Ozz | Ozzie |
| Ozzie Warlock And The Wizards |