- 1 Olly Murs
- 2 Ozzy Osbourne
- 3 OMFG
- 4 Omar Akram
- 5 Oliver Tree
- 6 Offset
- 7 Ozuna
- 8 OsamaSon
- 9 Oliver Heldens
- 10 Ozielzinho
- 11 Okapi
- 12 Omi
- 13 Odetari
- 14 Ogryzek
- 15 Oskar Schuster
- 16 Oliver Scheffner
- 17 Otis Redding
- 18 Orjan Nilsen
- 19 Outasight
- 20 Omarion
- 21 Offer Nissim
- 22 OMER DEEP
- 23 Owsey
- 24 Olly Alexander
- 25 Overspace
- 26 orb1t
- 27 Ol' Dirty Bastard
- 28 Ottomix
- 29 Obadiah Brown-Beach
- 30 Ogi