Artisti — OP
- Op8
- Opa Sex
- Opal
- Opanka Hc
- Opcion Sonica
- Open Air Stereo
- Open Hand
- Open Skyz
- Openbsd
- Opening
- Opera Atomic
- Opera Ix
- Opera Magna
- Operacion Triunfo
- Operatic
- Operatica
- Operatika
- Operation Error
- Operation Friendship
- Operation Ivy
- Operationcliff Clavin
- Operator
- Operator Please
- Opeth
- Opgezwolle
- Ophelia
- Ophelie Winter
- Ophis
- Ophthalamia
- Opiate For The Masses
- Opick
- Opio
- Opm
- Oppenheimer
- Oppera
- Oppie Andaresta
- Opposing Perfection
- Opposition Of One
- Opposition Party
- Oppressor
- Opshop
- Opt To Change
- Optic
- Optical 2
- Optiganally Yours
- Optimo
- Optimus Rhyme
- Option 1
- Optional Reason
- Opus
- Opus Dai
- Opus Iii
- Opus Podunk
- Opus Pro
- Opus X