Artists by letter: O (1415)
Oasis
47 albums
OneRepublic
32 albums
Ozzy Osbourne
35 albums
Owl City
8 albums
O.M.D.
23 albums
Olivia Newton-John
20 albums
Otis Redding
4 albums
Outkast
7 albums
Oscar Peterson
165 albums
Olly Murs
4 albums
Orb
42 albums
Of Montreal
12 albums
Orbital
22 albums
Opeth
19 albums
Ocean Colour Scene
18 albums
One Direction
1 albums
Okkervil River
21 albums
O.A.R.
6 albums
Oliver Shanti
22 albums
OK Go
5 albums
Ottmar Liebert
17 albums
Ozric Tentacles
26 albums
Our Lady Peace
8 albums
Old Crow Medicine Show
4 albums
Oomph!
21 albums
Omar And The Howlers
12 albums
O'Jays
5 albums
Omara Portuondo
24 albums
Orianthi
4 albums
Outlaws
4 albums
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