7 Ο Γιάννης Αγγελάκας και οι Επισκέπτες
5 Ô Paradis
6 O Pioneers!!!
7 O Quam Tristis
9 O Yuki Conjugate
1 DJ O!uz
5 Karen O and the Kids
9 Rodney O & Joe Cooley
8 The O
9 O.A.R.
3 O.B.I.
9 O.C. US rapper
9 The O.C. Supertones
5 O.G.
5 O.G.C. Originoo Gunn Clappaz
5 O.H.M.
9 O.L.D.
8 O.Lamm
5 O.mega
9 o.n.a.
7 O.O.O.D.
7 O.P.A.
7 .O.Rang
3 O.S.C. Olaf Seider Coincidence, project of Olaf Seider
5 O.S.T.
9 O.S.T.R.
8 O.T. Quartet
4 O+S
6 o2 Carsten "o2" Ohlsen, remixes of video game music
7 O'2L
8 o9
2 OA
5 OAG
9 The Oak Ridge Boys
9 Paul Oakenfold
2 Ski Oakenfull
9 Philip Oakey & Giorgio Moroder
5 Michael Oakland
8 Oakley Hall
2 Paul Oakley
1 Oaks
4 Oaksenham
9 Oasis English Britpop group
7 Oasis Omar-S and Shadow Ray
4 Jackie Oates
6 John Oates
7 Das Oath
8 Oathean
3 Obadia
5 Obadiah Parker
8 Barack Obama
5 小畑ミキ Japanese 60s idol singer
3 小畑実
3 Obedientbone
3 Oberkampf
1 Oberon German goth rock/neo folk artist Bard Titlestad
9 Conor Oberst
8 Conor Oberst and the Mystic Valley Band
6 Obfusc
5 Obi UK britpop band
7 Obiat
8 Ray Obiedo
9 Pascal Obispo
9 Obituary
4 Object industrial, Andreas "The Spectre" Malik
6 Object Lawrence English
2 Object Beings
6 Object One
2 Objekt4
9 OBK
7 Obligatorisk Tortyr
4 Oblique Brown
2 Obliteration Norwegian death metal band
6 Obliveon
3 Jack Oblivian
9 Oblivians
8 Oblivion Dust
7 Oblivion Ensemble
3 Oblivion Sun
4 Oblong
2 Vidna Obmana & Serge Devadder
5 Vidna Obmana & Jeff Pearce
1 Vidna Obmana & Sam Rosenthal
1 Obo
3 Sean O'Boyle
5 Jacob Obrecht
7 David O'Brien
7 David O'Brien & Kevin Browne
1 David O'Brien & Ewan O'Brien & Kevin Browne
1 Ewan O'Brien & David O'Brien & Kevin Browne & Evan Jenkins
7 Ian O'Brien
3 Paddy O'Brien & Séamus Connolly
9 Richard O'Brien
1 Sonny O'Brien
9 Tim O'Brien US bluegrass musician
6 Tim & Mollie O'Brien
5 Tim O'Brien & Darrell Scott
5 Ian O'Brien-Docker
9 Obrint Pas
7 O'Bryan
7 Obsc(y)re
8 Obscenity
9 Obscenity Trial
8 Obscura
6 Obscurant
2 Obscurcis Romancia
1 Obscure Spanish death metal band
1 Obscure Infinity
6 The Obscure
4 Obscurity Swedish death metal band
2 Obscurus Advocam
2 Observe & Control
3 The Observer All Stars aka The Observers
7 The Observers reggae group, aka The Observer All Stars
9 The Obsessed
8 Obsession
5 Obsidia Austrian Metal Band
3 Obsidian Gate
6 Obszön Geschöpf
8 Obtained Enslavement
3 Obtest
1 Obús
3 The Obvious
9 Obywatel G.C.
8 John O'Callaghan trance dj/producer/artist
7 Patricia O'Callaghan
8 Ocarina
9 Ric Ocasek
3 The Occasional Keepers
8 Occult Dutch thrash metal band
4 OCDJ
7 Ocean Polish Rock Band
1 Ocean US metal band
9 The Ocean Blue
4 Ocean Chief
9 Ocean Colour Scene
7 Ocean Drive
1 The Ocean Fracture
9 Billy Ocean
9 The Ocean
6 Oceana
2 Oceana Company
1 Oceanfall
2 Oceanhead
6 Oceania
9 OceanLab
4 OCEANLANE
4 Oceanographer
3 Oceans Oceans are a post-rock band from Illinois.
8 Oceans of Sadness
4 Oceanship
9 Oceansize
5 Ocelot
4 Ochi Brothers
2 Amparo Ochoa
9 Eliades Ochoa
7 Ωχρά Σπειροχαίτη
9 Ochre
9 Phil Ochs
5 Uwe Ochsenknecht
9 Johannes Ockeghem
4 Ockham's Razor
2 Ocoai
6 Helen O'Connell
9 Maura O'Connell
5 Robbie O'Connell
9 O'Connor
2 Caroline O'Connor
6 Gerry O'Connor Banjo and fiddle player
9 Hazel O'Connor
7 Jennifer O'Connor
5 Karl O'Connor & Peter Sutton
9 Mark O'Connor US bluegrass, country and classical fiddler/composer
4 Mark O'Connor's Hot Swing Trio
9 Paddy O'Connor & Friends
9 Sinéad O'Connor
8 Tony O'Connor
4 Ocote Soul Sounds
5 Ocrilim
8 OCS
5 Ocsid
6 Octagon Man
4 The Octagon
3 Octavcat
5 Octave
9 Octave One Burden brothers, US techno producers
7 Octavia Sperati
2 Octavius
6 Octet
7 Octex
6 Octinomos
6 October 31
6 October Fall
8 October Falls
8 October Project
7 October Tide
3 Octobre
6 Octolab
2 Octopus 1970s German progressive rock group
8 The Octopus Project
6 The Octopus Project & Black Moth Super Rainbow
3 Ocuban
9 Ocults
7 Tomislav Ocvirek
5 OD404
8 Oda Relicta
7 小田和正
4 Yuji Oda
4 Odal
3 John O'Daniel
8 Odawas
9 Anita O'Day
3 Molly O'Day & The Cumberland Mountain Folks
6 W Witrynach Odbicia
4 Odd
6 Odd Arnie
5 The Odd Couple
9 Odd Nosdam
8 The Odd Numbers
2 The Odd Toot
5 Oddioblender
8 Oddisee
3 Oddjob
9 Odds Canadian rock band
7 Oddział Zamknięty
9 O'Death
6 Odes of Ecstasy
4 Odessi
9 Odetta
7 Paul O'Dette
3 Odhinn
5 L'odi social
1 OdiakeS
4 Odin
4 Odin Dragonfly
1 Odio Su Tela
3 Odious
7 Odious Mortem
3 Odium
3 Odium Immortalis
7 Colby O'Donis
4 "Ace" O'Donnell
9 Daniel O'Donnell
6 Erin O'Donnell
1 Kevin O'Donnell's Quality Six
9 Martin O'Donnell & Michael Salvatori
2 Nathanael W. O'Donnell
6 Rosie O'Donnell
9 Ryan & Rachel O'Donnell