Artists O
- O.A.R.
- Oasis
- Of Montreal
- OK Go
- Okkervil River
- Old 97's
- Old Crow Medicine Show
- Omar Kent Dykes, ...
- One Day as a Lion
- OneRepublic
- Opeth
- Original Broadway Cast
- Original Broadway Cast, ...
- Original Broadway Cast, Christine Ebersole, John McMartin, Bob Stillman
- Original Cast Recording
- Original Game Soundtrack
- Original Soundtrack
- Original Soundtrack, ...
- Original Television Soundtrack
- Original TV Soundtrack
- Original TV Soundtrack, ...
- Ornette Coleman
- Otis Redding
- OutKast
- Ozomatli
- Ozzy Osbourne
