All Artists With “O”
- Oasis (Noel & Liam Gallagher)
- Ocean, Danny (Venezuelan singer, songwriter and producer, "Me rehúso"/"Baby I Won’t")
- Ocean, Frank
- Odell, Tom
- ODESZA
- Oerding, Johannes
- Ofenbach (French DJ duo)
- Offset (Atlanta rapper, member of Migos)
- Oldfield, Mike
- Omar Courtz (Joshua Omar Medina Cortes)
- Omega (Hungarian rock band)
- One Direction (English‐Irish pop boy band)
- OneRepublic
- Orbison, Roy
- Orchestral Manoeuvres in the Dark
- Oreja de Van Gogh, La
- Orff, Carl (composer)
- Original Koffee (Jamaican reggae singer Mikayla Simpson AKA Koffee)
- Orozco, Antonio (Spanish singer-songwriter)
- Osbourne, Ozzy
- Oslo Gospel Choir
- Ott, Kerstin (German (Berlin) Singer)
- Ötzi, DJ (Austrian entertainer and schlager singer)
- OutKast
- Ovy on the Drums
- Owens, Buck
- Ozuna
- O’Connor, Sinéad (Irish singer‐songwriter)
- O’Day, Anita
- O’Sullivan, Gilbert