O
- Oakenfold (1)
- Billy Ocean (2)
- Oceana (1)
- Octahvia (1)
- Oezlem (1)
- The O'Jays (1)
- Olive (1)
- Ollie & Jerry (1)
- One Direction (1)
- Ono (9)
- Opus III (2)
- Rita Ora (2)
- The Originals (1)
- Kelly Osbourne (1)
- Oscar G and Ralph Falcon (1)
- Robert Owens (2)
Read more about this topic: List Of Artists Who Reached Number One On The U.S. Dance Chart