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