| | - One Direction
- Of Monsters and Men
- OneRepublic
- Olly Murs
- Oasis
- OHMME
- One Desire
- Owl City
- Orson
- Ozzy Osbourne
- Ocean Alley
- Other Lives
- Old Dominion
- Oh Wonder
- The Offspring
- Ofenbach
- OutKast
- Oliver Tree
- OMC
- OK Go
- Owen
- OMI
- The Orielles
- OTR
- The Orb featuring David Gilmour
- Omarion
- The O'Reillys and The Paddyhats
- Otis Redding
- Orville Peck
- Olafur Arnalds & Alice Sara Ott
- Old Crow Medicine Show
- One Night Only
- ODESZA
- One Day as a Lion
- Oceans
- Orchestral Manoeuvres in the Dark
- Opeth
- Oh Sees
- Okay Kaya
- Orianthi
- Orleans
- O-Zone
- Outasight
- Outlaws
- Offset
- OnAir
- Olafur Arnalds & Nils Frahm
- The Ozark Mountain Daredevils
- Otto Klemperer, New Philharmonia Orchestra
- Omega Infinity
- Ozuna
- Offa Rex
- Oso Oso
- O.A.R.
- The Ordinary Boys
- Our Native Daughters
- The Overtones
- Ocean Grove
- Olafur Arnalds
- Okkervil River
- Of Mice & Men
- The Orwells
- Olive
- The O'Jays
- Odyssey
- Ought
- Oh Land
- Obie Trice
- Olivia Newton-John
- Opal
- Owen Pallett
- Oscar and the Wolf
- Owl John
- Olivia Chaney
- The Offering
- Ona
- Ol' Dirty Bastard
- Our Lady Peace
- The Outfield
- Otis Rush
- The Orb
- Oscar Peterson
- Outlandish
- Operation: Mindcrime
- Orbital
- Otherwise
- Oliver Heldens
- Operation Ivy
- Oneohtrix Point Never
- Oh the Larceny
- The Oh Hellos
- Odd Future
- Old Man Jasper
- Oonagh
- Odious Mortem
- Ocean Colour Scene
- Oingo Boingo
- Omar
- Oran "Juice" Jones
- Oranssi Pazuzu
- Oozing Wound
- Ottoman Turks
- Old Salt Union
- OceanLab
- Ohtis
- Orgy
- The Oscar Peterson Trio
- One True Pairing
- Orpheus Nine
- of Montreal
- Oleta Adams
- Old 97's
- Oddisee
- Overkill
- Oliver
- Outer Spaces
- One Eleven Heavy
- Orquesta Akokan
- Omni
- Orquesta Del Tango De Buenos Aires
- Otis Redding & Carla Thomas
- Ola Gjeilo
- Ohio Players
- Outfit
- Ofra Haza
- Ovlov
- Oren Lavie
- One EskimO
- Olli Schulz
- Of Virtue
- The Only Ones
- Olivia Holt
- Ozomatli
- The Ocean Blue
- Oberhofer
- Onyx
- Odie
- Overcoats
- ONE OK ROCK
- Otis Stacks
- Oz Noy
- Otis Taylor
- Orden Ogan
- One Way
- Obadiah Parker
- Objekt
- The Olms
- Omer Klein
- Obsequiae
- Orchestra Baobab
- Ozone
- Olga Pashchenko
- Orange Goblin
- Oval
- Omar Dykes
- Oathbreaker
- Ojos de Brujo
- OSI
- Outlasted
- Orishas
- Otep
- Oh Susanna
- Oscar
- Orion's Reign
- Oh Laura
- Open Mike Eagle
- Otto Klemperer, Wiener Philharmoniker
- Ossuarium
- Olivia Lane
- Over the Rhine
- OFF!
- The Osmonds
- Operator Please
- Opossom
- Oh Pep!
- On Thorns I Lay
- Oliver Nelson
- Oleander
- Orange Juice
- The Olympians
- Overland
- Organic Pulse Ensemble
- OCS
- Omnimotion
- The Oak Ridge Boys
- Obscure Infinity
- Oliver Koletzki
- Ostura
- Out of Eden
- Omni Trio
- Oh, Sleeper
- Oli Silk
- OPM
- Ohrenfeindt
- The One Hundred
- Olivia Nelson
- Obituary
- Ottmar Liebert
- Oli Brown
- Oceana
- O.R.K.
| - Our Broken Garden
- Orphaned Land
- Oxford Collapse
- Osibisa
- Oi Va Voi
- Operators
- Octo Octa
- O.C.
- One Way Ryde
- ORANGE RANGE
- One Be Lo
- Owl Eyes
- Obscura
- Odd Future Wolf Gang Kill Them All
- Olivia
- Olga Scheps
- The Original 7Ven
- Operator
- Otis Grand
- Onita Boone
- Operus
- Ojerime
- The Ocean
- Off With Their Heads
- Omnium Gatherum
- One Dove
- Oceansize
- Olivia Ruiz
- Orgone
- Om
- oOoOO
- Oh No! Oh My!
- Oumou Sangare
- Our Last Night
- Otis Spann
- Oum Shatt
- The Obsessed
- Oh My!
- Otto Klemperer
- O.Children
- Obliteration
- Ozric Tentacles
- Oceans Ate Alaska
- Oysterhead
- One Self
- Octopus
- Once Human
- Olof Arnalds
- Only Men Aloud
- Opus III
- Orchid
- Ornette Coleman
- Oomph!
- Odetta
- Omar & The Howlers
- O'Donel Levy
- Odetta Hartman
- The Orchestra of Syrian Musicians
- Otis Gibbs
- Our Hollow, Our Home
- Olivia Jean
- Okilly Dokilly
- Ornette
- Oliver Schories
- Outloud
- Owiny Sigoma Band
- Orchestra del Teatro alla Scala di Milano & Claudio Abbado
- Ost & Kjex
- The Outsiders
- Okta Logue
- Owel
- Odyssice
- Oregon
- Oliver Wakeman with Steve Howe
- Ocean
- Oneman
- O'Hooley & Tidow
- Oxo 86
- Oliva
- Oliver Huntemann
- Oscar D'Leon
- The Oath
- Oceans of Slumber
- The Old Firm Casuals
- Osukaru
- Olivia Broadfield
- One More Girl
- Olivia O'Brien
- Ou est le swimming pool
- Olly Anna
- Oblivion Sun
- Outer Heaven
- Oxbow
- Old & In the Way
- Omar Kent Dykes & Jimmie Vaughan
- Olden Yolk
- Off Road Minivan
- Oliver Mtukudzi
- The Orange Peels
- Ookay
- Organized Konfusion
- Ozark Henry
- Old and New Dreams
- Obey The Brave
- Oh No Ono
- Ott
- Olav Larsen & the Alabama Rodeo Stars
- OTEO
- Old Funeral
- Os Mutantes
- Omar Apollo
- Orphaned Land & Amaseffer
- Omar Sosa
- Origin
- The Other Two
- Orchestra and Chorus of the Royal Opera House, Covent Garden & Sir Georg Solti
- The Octopus Project
- Oxia
- Orchestra and Chorus of the Welsh National Opera, Richard Bonynge
- Obits
- October Fall
- Opus 5
- Oscar Brown Jr.
- Orba Squara
- ONWE
- Ola Podrida
- The Orange Humble Band
- The Orchids
- Ostrogoth
- Out Hud
- Orchester der Deutschen Oper Berlin, Giuseppe Sinopoli
- Orange Blue
- Olin & The Moon
- Organectomy
- Oesch's die Dritten
- Outlands
- Oddarrang
- Ohm Guru
- On An On
- Oysterband
- Oshima Brothers
- Official Secrets Act
- Outlaw Blood
- Oblivians
- Ocote Soul Sounds & Adrian Quesada
- Orlando Julius
- Oh No Not Stereo
- Omar Codazzi
- Omnia
- O+S
- One-Way Mirror
- Omen
- Oakley Hall
- Odds
- Oxide & Neutrino
- Odonis Odonis
- October Falls
- Oliver Shanti
- Only Child
- Oneida
- Onslaught
- One Less Reason
- The Olivia Tremor Control
- Ollabelle
- Otros Aires
- Old Man Markley
- Oni
- Ocote Soul Sounds
- O
- Oliver Shanti & Friends
- Omar Rodriguez Lopez
- O'Death
- Of Modern Architecture
- Osada Vida
- The One AM Radio
- Othello & The Pocket Change Band
- Overdrive
- Orcas
- One Second Bridge
- Olu Dara
- Owen Temple
- OperaBabes
- Omega
- The Old Ceremony
- Orchestra and Chorus of The Royal Opera House Covent Garden, Richard Bonynge
- Or, The Whale
- O'Brother
- Orion the Hunter
- Outline
- Outworld
- Oscar Peterson, Ray Brown & Milt Jackson
- Orchestra and Chorus of La Scala, Carlo Sabajno
- Omar S
- Olympia
- Orchestre Poly-Rythmo
- Orchestre de l'Opera de Paris, Pierre Boulez
- Only Crime
- Orenda Fink
- Ormonde
- Ogre
- Opera Diabolicus
| - Oka
- Odd Couple
- Ours
- Operatica
- Outline in Color
- Ole Borud
- Oforia
- The Organ
- Outrage
- Oriol
- Orange Blossom
- Omar Coleman
- Otmar Suitner, Staatskapelle Berlin
- Outlawz
- Odd Nosdam
- Old Man's Child
- Overhead
- Old Canes
- Ozma
- Oxmo Puccino
- OVERWERK
- Orang-Utan
- Ouroboros
- The Other Half
- Osiah
- One More Time
- October Project
- Old Man Gloom
- Opio
- Oded Tzur
- Outshyne
- The Overseer
- Oresund Space Collective
- The Other Tribe
- Originoo Gunn Clappaz
- Organissimo
- Odd Squad
- One Minute Silence
- OOIOO
- Outrageous Cherry
- Orrin Evans
- Onetwo
- One to One
- One Bad Son
- Oophoi & Louisa John-Krol
- The Ornette Coleman Double Quartet
- Oceano
- Orchestra of Spheres
- One Without
- ohGr
- October Country
- The Open
- Odawas
- Olivier Le Goas Quartet
- Olusheyi Banjo
- Old Haunts
- The Ornette Coleman Trio
- O.B. Buchana
- Osmo Ikonen
- Othello
- Osunlade
- The Out Crowd
- Oh No
- Old Man's Will
- Owls
- OHHMS
- Over The Ocean
- Ostrich
- Omnihility
- October Tide
- The Order of Elijah
- Ohm-G
- Olivia Pedroli
- Orange Sunshine
- The Owls
- One for the Team
- Octavia Sperati
- Officers
- One-Eyed Doll
- Olga Kouklaki
- Omar Rodriguez-Lopez
- Otis Clay
- Otargos
- Opus
- One Way Ride
- O'Ryan
- Of Eyes That See
- Odium
- Oedipus
- Old Wives
- Ortolan
- Orient Fall
- Old Man River
- Omnizide
- Orthodox Celts
- Oya
- Organic Grooves
- Osanna
- Orwell
- The Opposites
- Olympos Mons
- Omega Massif
- Oxford Circle
- Overdream
- The Oscillation
- Obelyskkh
- Ocha la Rocha
- Osamu Kitajima
- Old Fire
- Onesidezero
- Opprobrium
- On Fillmore
- Oakenshield
- Oliver Haidt
- Omotai
- Oureboros
- Onkel Tom Angelripper
- Oceans Divide
- Oscar + Martin
- Orne
- Ohbijou
- Open Hand
- OuterSpace
- The O.C. Supertones
- Orup
- Omega Lithium
- Okay City
- Oophoi
- Ola Onabule
- Old Time Relijun
- Os Pontos Negros
- Opera IX
- One Ton
- One Man Army
- Oakalla
- Oslo Swan
- Ordog
- Opgezwolle
- Oophoi & Tau Ceti
- Okoume
- Odjbox
- Out Cold
- Original Flavor
- On a Pale Horse
- Overseer
- Olli Banjo
- Os Paralamas do Sucesso
- Organix
- Orange Range
- Oxmo Puccino & The Jazzbastards
- Oogee Wawa
- O Rappa
- Oslo 13
- Olin and the Moon
- Obi Fernandez
- Otomo Yoshihide, Bill Laswell, Yoshigaki Yasuhiro
- Oblique Rain
- On Watership Down
- Officium Triste
- Okay
- Obscurity
- Oskar Linnros
- Okera
- One Man Army & The Undead Quartet
- Os Golpes
- Oddjob
- Obfusc
- Overnight Lows
- onelinedrawing
- Odd Project
- Ofrin
- Odyssea
- Ondskapt
- Ocultan
- Onry Ozzborn
- Ott Lepland
- Oholics
- Outcast
- Of Machines
- Open the Skies
- Onkel Kankel
- Osten med Resten
- Overdose
- Orth
- The Operation
- Oliver Hart
- Ordo Funebris
- Otto
- Opensouls
- Our Subatomic Earth
- Order of Ennead
- Orcustus
- One Hundred Hurricanes
- Ogris Debris
- The Original Sinners
- Ono Loco & Lil Toro
- Oz
- Old Hundred
- Ole ohne Kohle
- Officer!
- Odd Nordstoga
- O.C. & PF CUTTIN
- Ortel
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