- 1 Olly Murs
- 2 Ozzy Osbourne
- 3 OMFG
- 4 Offset
- 5 Ogryzek
- 6 Omar Akram
- 7 Odetari
- 8 Ozuna
- 9 Ozielzinho
- 10 Oliver Scheffner
- 11 Oscar Peterson
- 12 One True God
- 13 Ola
- 14 Omah Lay
- 15 Otis Redding
- 16 ONR
- 17 Oliver Tree
- 18 OsamaSon
- 19 Oxlade
- 20 Orjan Nilsen
- 21 OTR
- 22 OJAX
- 23 Oliver Frank
- 24 Oliver Heldens
- 25 Omar Montes
- 26 Owsey
- 27 Original Motion Picture Soundtrack
- 28 Oscar Isaac
- 29 ODIE
- 30 Overseer