Genres
- Avant-Garde
- Blues
- Children's
- Classical
- Comedy/Spoken
- Country
- Easy Listening
- Electronic
- Folk
- Holiday
- International
- Jazz
- Latin
- New Age
- Pop/Rock
- R&B
- Rap
- Reggae
- Religious
- Stage & Screen
- Vocal
- Pop/Rock
One Direction 25
OneRepublic 53
Ozzy Osbourne 88
Oasis 51
Owl City 46
Olivia Newton-John 48
Of Monsters And Men 11
Olly Murs 17
Orchestral Manoeuvres In The Dark 39
Opeth 39
Overkill 48
Old Crow Medicine Show 15
Outlaws 23
Orbital 46
Orb 92
Old Dominion 10
O.A.R. 21
Orleans 17
Oingo Boingo 33
Old 97's 27
Ozric Tentacles 51
Omi 3
Of Mice & Men 15
Ocean Colour Scene 40
Omarion 13
Ozark Mountain Daredevils 5
Orianthi 6
Our Lady Peace 15
Odesza 11
OK GO 10
Olafur Arnalds 21
Obituary 24
Otherwise 8
Our Last Night 26
Orgy 15
Omar & the Howlers 23
Otep 11
Ofra Haza 11
Okkervil River 17
Oleta Adams 11
Odyssey 16
Of Montreal 25
Orange Juice 13
Over The Rhine 25
Orange Goblin 10
One Ok Rock 23
Ohio Express 4
Oomph! 41
Oh Wonder 12
Oysterband 13
Onslaught 13
Omnia 15
Omar 10
Oriya
The Ocean 21
Outsiders 7
Orden Ogan 9
Oh Land 9
Outcast 4
Operation Ivy 5
Outasight 9
Omen 10
Orchid 9
Ozomatli 8
Orphaned Land 10
Os Mutantes 20
Operation: Mindcrime 4
Other Lives 5
Ottawan 26
Ornella Vanoni 11
Obsession 7
Oceansize 21
One Night Only 4
Obscura 6
OM 14
Otto Knows 3
Oh, Sleeper 5
One Less Reason 8
Oz 14
Offer Nissim 12
O-Town 3
Odin 10
Oleander 6
Oliver Koletzki 18
Old Man's Child 8
Omnium Gatherum 12
Ofenbach 5
Orion 19
Oophoi 47
Oliver Heldens 2
Oceana 6
Overland 7
One Tree Hill
Owen Pallett 7
Oscar And The Wolf 3- Offenbach 8
Oonagh 7
Ought 3
Osanna 11
— Artist has been update in past 30 days- Artist 3— Artist has more than two albums