Orodruin
black metal, doom metal, metal
Orphaned Land
death metal, folk metal, oriental metal, progressive death metal, progressive metal
Örsten
electronica, trip hop, trip-hop
Oscar Brown Jr.
blues, funk, jazz, singer-songwriter, vocal jazz
Oscar D'León
salsa, venezuela, world music
Oscar Isaac
singer-songwriter, soundtrack, folk
Osker
emo, pop punk, punk rock, ska
Osmi Putnik
hard rock, heavy metal, metal
Ossian
heavy metal, power metal, folk
Ostrogoth
heavy metal, power metal, speed metal
Osunlade
deep house, electronic, electronica, house, soul
Osvajači
glam metal, hard rock, heavy metal, speed metal
