- Oscar Castro Nieves -- Oscar Figueroa
- Oscar Ford -- Oscar Lalo
- Oscar Lampe -- Oscar Noriega's Play Party
- Oscar O'Bear -- Oscar R.Acevedo/Rupert S.Salazar
- Oscar Ramirez -- Oscar Tharpe
- Oscar the Grouch -- OscarL
- Oscarlima -- Osgood & Blaque Blues Band
- Osgood/Jaedig Quartet -- Osictone
- Osie Hawkins -- Oskar Offermann
- Oskar Redwitz -- Oslo Fluid
- Oslo Gospel Choir -- Osmán Pérez Freire
- Osmo Band -- oso rey
- Oso Rich -- Oson