- O - TABLATURAS
- O ápeiron
- O Poderoso Chefão
- O Rappa
- O Terço
- O-two
- O-v-s-a
- O.c.
- Oag
- Oasis
- Oatmeal Dog
- Oberhofer
- Obey
- Obituary
- Obrint Pas
- Obscurity
- Oc Supertones
- Ocean
- Ocean Colour Scene
- Ocean Hero
- Oceana
- Oceanics
- Oceano
- Oceans Ate Alaska
- Oceans Of Sadness
- Oceansize
- Oconnor
- Octavia
- October Crisis
- October Fall
- October Falls
- October Mourning
- October Tide
- Odd And Idle
- Odd Project
- Oddzial Zamkniety
- Odi Acoustic
- Odium
- Oeil Pour Oeil
- Of Machines
- Of Mice And Men
- Of Mice E Men
- Of Montreal
- Of The Wand And The Moon
- Off
- Off With Their Heads
- Offbeatz
- Officer Negative
- Officer Roseland
- Offspring
- Oficina G3
- Ofwgkta
- Oh Chentaku
- Oh Me My
- Oh No Not Stereo
- Oh Sleeper
- Oh The Blood
- Oi Scouts
- Oingo Boingo
- Ok Go
- Oktetas
- Oktoberklub
- Okuda Miwako
- Ol Dirty Bastard
- Olaf Henning
- Old Crow Medicine Show
- Old Fashion Knife Fight
- Old Gods Of Asgard
- Old Man Gloom
- Old Man Shattered
- Old Mans Child
- Oleander
- Oli Brown Band
- Oliver
- Olivia Newton-john
- Olivia Olson
- Olivia The Band
- Olly Murs
- Olta Boka
- Olympia
- Omar A Rodriguez-lopez
- Omar Rodriguez-lopez
- Omarion
- Omd
- Omen
- Omid 16b
- Omnium Gatherum
- On Broken Wings
- On The Last Day
- On The Might Of Princes
- Once Nothing
- One Bad Pig
- One Bullet Left
- One Day As A Lion
- One Dead Three Wounded
- One Dimensional Man
- One Dollar Short
- One Fell Swoop
- One Less Reason
- One Ok Rock
- One Pedaled Bike
- One Republic
- One Step Ahead
- One Step Beyond
- One The Juggler
- One Too Many
- One True Thing
- One Voice
- One Way System
- One Way To Rick
- One-eyed Doll
- Onerepublic
- Onesidezero
- Oney
- Onideeva
- Oniontree
- Only Crime
- Only Living Witness
- Only1noah
- Onmyouza
- Onslaught
- Onward To Olympas
- Oomph
- Opca Opasnost
- Opeath
- Open Hand
- Open Revolt
- Open The Skies
- Openfly
- Opera Magna
- Operation Ivy
- Operator Please
- Opeth
- Ophthalamia
- Opiate For The Masses
- Opie Gone Bad
- Opium
- Opm
- Opposite Zero
- Opressor
- Opshop
- Optimus Rhyme
- Or Just Not
- Oragic
- Orange 9mm
- Orange And Lemons
- Orange Goblin
- Orange Range
- Orange Sky
- Orba Squara
- Orbit
- Orbital
- Orcatastrophe
- Orchestra Baobab
- Orchid
- Ordinance
- Ore Ska Band
- Orianthi
- Origa
- Origin
- Orion The Hunter
- Ornella Vanoni
- Ornob
- Orphanage
- Orphaned Land
- Orplid
- Orson
- Os Cavaleiros Do Zodíaco
- Os Condenados
- Os Excluídos
- Os Novos Baianos
- Os Paralamas Do Sucesso
- Os Pedrero
- Oscar Hammerstein
- Oscar Lopez
- Oscar Peterson
- Osi
- Osker
- Ossian
- Ostava
- Otep
- Otis Taylor
- Otium
- Ottmar Liebert
- Otx
- Ounce Of Self
- Our Innocence Lost
- Our Lady Peace
- Our Last Night
- Our Reflections
- Our Time Down Here
- Ouran Host Club
- Ourania
- Out Of Your Mouth
- Outbreak
- Outcast
- Outer Limits
- Outernational
- Outfield
- Outkast
- Outlandish
- Outlaws
- Outlier
- Outono 09
- Outrage
- Over Gravity
- Over It
- Over My Dead Body
- Overdose
- Overkill
- Overlead
- Overscene
- Overseer
- Owen
- Owl And Penny
- Owl City
- Oxblood
- Oxi3
- Oxygen Empty Now
- Oxymoron
- Oysterhead
- Oyuugi Wagamama-dan X Paradeis
- Oz Raker
- Ozric Tentacles
- Ozzy Osbourne
