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'Day, Alan | O'Day, Anita | O'Donnell Roger |
| O'Donnell, Al | O'Donnell, Alison | O'Donnell, Daniel |
| 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, 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. 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 | 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 | Oats, Wild | Oattes Van Schaik |
| Obassey, Patty | Obel, Agnes | Obelisk |
| Obernik, Sam | Oberon | Oberst, Conor |
| Obey The Brave | Obey, Ebenezer | OBF |
| Obi | Obie Trice | Obituary |
| Objayda | Obliveon | Obraztsova, Elena |
| Obsession | Obus | Ocasek, Ric |
| Occasion, The | Occasional Few, The | Occasional Five, The |
| Occasional Project, The | Occasionally David | Ocean |
| Ocean (Modern Soul) | Ocean Colour Scene | Ocean Grove |
| Ocean Party, The | Ocean, Billy | Ocean, Humphrey |
| Oceanic | Oceans Ate Alaska | 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 | Oculus | Odd Man Out |
| Oddie, Bill | Odds & Ends | Odell, Tom |
| Odetta | Odin | Odnoposoff, Ricardo |
| Odrich, Ron | Odyssey | Odyssey |
| Odyssey, The | Of Arrowe Hill | Of Mice & Men |
| Of Monsters And Men | Of Montreal | Ofarim, Esther |
| Ofege | Off | Off The Wall |
| Off With Their Heads | OFF! | Off-Shore |
| Offenbach (Rock) | Offenbach, Jacques | Offhooks, The |
| Official Secrets, The | Offshore | Offspring |
| Ofshore | Ofwerman, Rune | Ogan, Gary & Lamb, Bill |
| Ogdens, The | Ogdon, John | Ogdon, John & Lucas, Brenda |
| Ogerman, Claus | Ogermann, Claus | Oggum |
| Ogunde, Hubert | Ogura, Kei | Oh No |
| Oh No Ono | Oh Ok | Oh Well |
| Oh Wonder | Oh! Polo | Oh' Dev |
| Oh, Atoms | Oh, Nadia | ohGr |
| OHGR WELT | Ohi Ho Bang Bang | Ohio Express |
| Ohio Players | Ohlsson, Garrick | OHM |
| Ohno, Shunzo | Ohno, Yuji | Ohnuki, Taeko |
| 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 | Okosun, Sonny |
| Okumoto, Ryo | Ol Dirty Bastard | 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 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, Sy | Oliveri, Nick |
| Olivia De Havilland | Olivia Tremor Control, The | Olivier, Laurence |
| Olivor, Jane | Ollie & Jerry | 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 | Omen |
| Omen III | Omerta | Omi, Sonik |
| Omit | Omni Trio | Omnium Gatherum |
| Omowura, Ayinla | Omsk Russian Ensemble, The | Omura, Kenji |
| On 1 Crew | On And Ons, The | On Offs, The |
| 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 |
| One | One 2 Many | One Blood |
| 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-Eyed Jack | One-Eyed Jacks | 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 | 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 | 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 Dead | Opus III |
| Opus Int Music Ltd | Or-N-More | Ora |
| Ora, Rita | Orabge | Oraisòn, Jorge |
| Oral Exciters, The | Oram, Daphne | 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, Richard | Oranger |
| Orans | Orb | Orbidöig |
| Orbison, Joy | Orbison, Roy | Orbit, William |
| Orbital | Orbo Equitum Solis | Orca |
| Orcas | Orch. Of The Amsterdam Phil. | Orchard, Pat |
| Orchestra Baobab | Orchestra Filarmonica Di Roma | Orchestra Folklore Di Romagna |
| Orchestra Luna | Orchestra Makassy | Orchestra Of St. James, The |
| Orchestra Of The Opera-Comique | Orchestra Tango Cafe | Orchestra, Peace |
| 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 |
| Orchids (60S), The | Orchids, The | Ordeal, DJ |
| Order Of Apollyon, The | Order, Bogus | Ordinary Boys, The |
| Ordinary Man | Oregon | Orellana, Raúl |
| Oren, Peter | Orexis | Orff, Carl |
| Orford, Martin | Organ, The | Organisation |
| Organisms | Organization | Organized Konfusion |
| Organum | Orgazmo | Orgone Box |
| Orgy | Orianthi | Orielle |
| Orielles, The | Oriental Wind | 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 |
| Orlons, The | Orme, Le | Ormonde Folk, The |
| Ornadel, Cyril | Ornament | Ornamental |
| Oroonies, The | Orozco, Rafael | Orphan Egg |
| Orpheus | Orphic Soop | Orquesta De Antonio Bustamante |
| Orquesta Española De Baile | Orquesta Tipica Union Sanluise | Orquestra Casino De Sevilla |
| Orquestra Sinfônica Brasileira | Orr, Benjamin | Orrall, Robert Ellis |
| Orrico, Stacie | ORS | Orson |
| Orson Family, The | Ortega, Jeannie | Ortiz, Cristina |
| Ortolani, Riz | Orton, Beth | Orwell, Paul |
| 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 | 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 |
| 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 | Osorio, Jorge Federico | Ossian |
| Ossie & The Upsetters | Ossie Layne Show, The | Osterman Weekend, The |
| Ostrogoth | Osunlade | Osymyso |
| Otep | 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 | Otway & Barrett | Otway John |
| Ou Est Le Swimming Pool | Ouch | 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 Kid | Our Lady Peace | Our Lunar Activities |
| Our Tribe | Ousset, Cécile | Out Hud |
| Out Of Darkness | Out Of My Hair | Out Of The Blue |
| Out Of Your Mouth | Out On Blue Six | Out With Mummy |
| Out, Papercut | Out, The | Out-Phaze |
| 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 | Outpatience, The |
| Outrage | Outrider | Outside |
| Outsiders (Punk), The | Outsiders, The | Outsiders, The |
| Outsiders, The | Outsiders, The (US) | Outskirts Of Infinity |
| Outskirts, The | Ova | Oval |
| Ovary Lodge | Overall, Kassa | Overdraft, The |
| Overkill | Overlanders, The | Overload |
| Overload, Honcho | Overload, Shifty | Overlord |
| Overlord (Punk) | Overlords, The | Overmono |
| Override | Overstreet, Tommy | Overtones, The |
| Owen | Owen And Leon | 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 | Oxbow | Oxfam Glamour Models |
| Oxford Nights, The | Oxford, Vernon | Oxide Neutrino |
| Oxley, Louie | Oxley, Tony | OXO |
| Oxxo Xoox | Oxy And The Morons | 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 | Ozzie Warlock And The Wizards |