Song Styles for Artists / O
- O'Jays, The 2
- Oasis 4
- Odd Nordstoga 1
- Odyssey 2
- Offenbach 1
- Oklahoma 1
- Old Dominion 1
- Ole Ivars 1
- Oleta Adams 1
- Olga Tañón 1
- Olivia Newton-John 5
- Olle Adolphson 2
- Olly Murs 1
- One Direction 2
- One More Time 1
- OneRepublic 1
- Opus 2
- Orchester Heinz Gietz 1
- Orchestral Manoeuvres in the Dark 1
- Original Dixieland Jazz Band 1
- Original Dixieland Jazz Band, The 1
- Orsa Spelmän 1
- Osmonds, The 2
- Otis Redding 3
- Otis Rush 1
- Ottawan 2
- Outfield, The 1