O-5
- Otis Driftwood
- Otis Junior
- Otis Redding
- Otis Reed
- Otis Stacks
- Oto Nemsadze
- Otosan
- OTR
- Otray
- Otsuka Ai
- Otsuki Maki
- Ott Lepland
- Ottavia Bruno
- Ottavio De Stefano
- Ottavo Padiglione
- Otti Albietz
- Otto Knows
- Otto Nezbeda
- Otto Normal
- Otto Ohm
- Otto Orlandi
- Otto Reutter
- Otto Waalkes
- Ottodix
- Ottoman Empire Soundsystem
- Ottowan
- Otzeki
- Ou Est Le Swimming Pool
- Ou2s
- Ouais Chery
- Ouarda
- Ouf Le Prof
- Ougenweide
- Ought
- Ouiam El Mrieh
- Ouija Macc
- Ouimoshi
- Oum
- Oumar
- Our Blood
- Our Boy Drew & The Hustle Standard
- Our Brother The Native
- Our City Skyline
- Our False Heroes
- Our Game
- Our Girl
- Our Hollow, Our Home
- Our Innocence Lost
- Our Lady Peace
- Our Last Night
- Our Lives In Motion
- Our Mexican Butcher
- Our Mirage
- Our Native Daughters
- Our New Celebrity
- Our Past Days
- Our Reflections
- Our Song Band
- OurAfter
- Ouran High School Host Club
- Ourfa
- Ouri
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- Oussama Copenhagen
- Out Blazing Generation
- Out Like Pluto
- Out Lines
- Out of Control
- Out of Doubt
- Out Of Eden
- Out of Frame
- Out Of Order
- Out Of Reverie
- Outasight
- Outbreakband
- Outburst
- Outcast Youth
- Outerspace
- Outfit (The)
- Outhere Brothers
- Outkast
- Outlandish
- Outlast
- Outlaw
- OUTLAW AVE
- Outlaws
- Outlawz
- Outlet
- Outline (The)
- Outline In Color
- Outlines
- Outlook
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- Outloved
- Outrage
- Outrageus
- outRAGEus!
- Outro Lugar
- OutroEu
- Outshyne
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- Outside Agency (The)
- Outside Duo
- outsideOUTSIDE
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- Ouvindo
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- Ove Stoylen
- Over Atlantic
- Over It
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- Over Sands
- Overcoats
- OverDoz
- Overflow
- Overground
- Overgrown
- Overload Generation
- Overlorde
- Overly Attached Girlfriend
- Overmars
- OverMaster
- Overmood
- Overnight Classic
- Overnite
- Overprivileged (The)
- Overstreet
- Overtake
- Overthrow
- Overture Black
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- Overwerk
- Ovi
- Ovi, Junior H & Natanael Cano
- Ovidi Montllor
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- Ovlov
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- Owlle
- Owls
- Owls By Nature
- OWS
- Oxana
- Oxford Collapse
- Oxford Drama
- Oxi
- Oxia
- Oxide & Neutrino
- Oxmo Puccino
- Oxmo Puccino feat. K-reen
- Oxo 86
- Oxygen
- Oxygene
- Oxymoron
- OY
- Oyann
- Oystar
- Oyster Prairie
- Oysterband (The)
- Oz Noy
- Ozan
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- Oziel Popoca
- Ozkar Zulu
- Ozma
- Ozomatli
- Ozuna
- OZVN
- Ozymandias
- Ozz - 01
- Ozzie Nelson
- Ozzy Osbourne
- OZZY OZBOURNE
