O Positive	O'Brien, Michael	O'Callahan, Jay
O'Connell, Helen	O'Connor, Carroll	O'Connor, Des
O'Connor, Hazel	O'Connor, Mark	O'Connor, Sinead
O'Connor, Tony	O'Day, Alan	O'Day, Molly
O'Dell, Kenny	O'Dell, Rev. Tommy Ray	O'Donnell, Daniel
O'Dowd, Barry & the Shamrock Singers	O'Farrell, Talbot	O'Hagan, Patrick
O'Hara, Jill	O'Hara, Mary	O'Hearn, Patrick
O'Jays, The	O'Kanes	O'Keefe, Danny
O'Neal Twins, The	O'Neal, Alexander	O'Neal, Shaquille
O'Neill Brothers, The	O'Neill, Steve	O'Quin, Greg
O'Reilly, Kim	O'Rourke, Miceal	O'Shaughnessy, Owen
O'Sullivan, Gilbert	O'Sullivan, Jerry	O'Toole, Knuckles
O-Town	O.C.U.	Oak
Oak Ridge Boys	Oakes, Johnny	Oakland, Will
Oaks Band, The	Oaktown's 357	Oasis
Oatman, Don	Obituary	Oblivion Seekers
Obsessed, The	Obsession	Ocasek, Ric
Ocean	Ocean Blue, The	Ocean, Billy
Ochs, Phil	Octet, The	Odetta
Odyssey	Odyssey Group, The	Off Broadway / Off Broadway USA
Off Center	Off the Richter	Offbeats
Offenbach State Radio Orchestra	Offenders	Offspring
Ogdon, John	Ogermann, Klaus	Ohio Express
Ohio Light Opera	Ohio Players	Ohio State University Marching Band
Ohman, Chuck	Oingo Boingo	Oistrakh, David
Ojas	OK Go	OKC Blazers
Oklahoma	Oklahoma Baptist Festival Choir, The	Oklahoma City Blazers
Oktoberfesters, The	Ol Dirty Bastard	Old Country Festhaus Band
Old Friends Quartet	Old Hickory Quartet	Old Home Singers, The
Old Time Religion Singers, The	Old-Time Gospel Hour Choir	Oldfield, Mike
Oldham, Doug	Oleander	Oler, Newell
Olewsky Trio	Oliver	Oliver, Jim
Oliver, Sy	Olivia	Olivier, Jim
Olivor, Jane	Olomana	Olsen, George
Olsen, Mary-Kate & Ashley	Olshevski, Dave & Jan	Olsson, Nigel
Olstead, Renee	Olympia Brass Band	Olympic Runners
Olympics	Omar & the Howlers	Omarion
Omartian, Michael & Stormie	OMC	Omen
On Wings of Song	One	One 2 Many
One 2 One	One Bad Pig	One in the Spirit
One Truth	One Voice	One Way
One Way Rider	OneSideZero	Onion River Jazz Band
Only Living Witness	Ono, Yoko	Onslaught
Onyx	Open Skyz	Operaphone Concert Orchestra
Operation Ivy	Opereta Ensemble of the City Theatre - Linz	OPU5 (Opus Cinco)
Opus 7	Or-N-More	Orange
Orange Blossom Bluegrass	Orb	Orbison, Roy
Orbital	Orchester Der Beethovenhalle Bonn	Orchestra De Granados
Orchestra Harlow	Orchestra of North Germany	Orchestra of St. Lukes
Orchestra of St. Peter by the Sea	Orchestra of the 18th Century	Orchestra of the Age of Enlightenment
Orchestra of the Vienna Musikgesellschaft	Orchestra of Vienna Volksoper	Orchestra Spettacolo Casadei
Orchestra Unlimited	Orchestral Manoeuvres	Orchestral Strings
Orchestre de Chambre de Lausanne	Orchestre De Chambre De Munich	Orchestre De Paris
Orchestre Du Concertgebouw D'Amsterdam	Orchestre National De France	Orchestre National de I'ORTF
Orchestre Philharmonique de Berlin	Orchestre Symphonique De Montreal	Orchestre Symphonique de Prague
Orchestre Symphonique Des Concerts Chouteau	Oregon	Organ & Chimes
Organ Masters, The	Organ Orchestra, The	Organic Infest
Organization, The	Orgy	Original Caste, The
Original Sin	Original Sound Track, The	Originals, The
Orioles, The	Orion The Hunter	Orkiestra Polska
Orkis, Lambert	Orlando Christian Center	Orlando Pops Orchestra
Orlando, Tony	Orleans	Orme, Bob
Orquesta De Camara De Moscu	Orquesta La Solucion	Orquesta Nacional de Espana
Orquesta Romanticos de Cuba	Orr, Benjamin	Orrall, Robert Ellis
Orrells, The	Ortega, Fernando	Ortega, Gilbert
Orton, Beth	Osamu, Kitajima	Osborne Brothers, The
Osborne, Anders	Osborne, David	Osborne, Jeffrey
Osborne, Joan	Osborne, Ken	Osborne, Tony
Osbourne, Ozzy	Oscar Romano Orchestra	Osibisa
Osipov Balalaika Orchestra	Osiris	Oskar, Lee
Oslin, K.T.	Oslo Gospel Choir	Osman, Terry
Osmond, Donny	Osmond, Donny & Marie	Osmond, Marie
Osmonds, The	Ossman, Vess	Ostanek, Walter
Oswald, Brother	Other Company Artists, The	Other Company Strings Inc., The
Other Ones, The	Other Two, The	Otis, Clyde
Otis, Johnny	Otto, Richard	Our Boys Steel Orchestra
Our Daughter's Wedding	Our Lady Peace	Out Post Scotty & His Ramblers
Outback	Outdoor Plumbing Co.	Outfield, The
Outhere Brothers, The	Outkast	Outlaws, The
Outlawz	Outlets	Outsiders, The
Overkill	Overstreet, Paul	Overstreet, Tommy
Owen Simpson Family	Owens, Bill	Owens, Bonnie
Owens, Buck	Owens, Jack	Owens, Jamie
Owens, Jimmy	Owens, Ron & Patricia	Owens-Collins, Jamie
Oxford, Vernon	Oxpetals, The	Ozark Mountain Daredevils
Ozone