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 51
Ozzy Osbourne 70
Oasis 50
Owl City 46
Olivia Newton-John 47
Olly Murs 17
Of Monsters And Men 10
Orchestral Manoeuvres In The Dark 39
Opeth 39
Old Crow Medicine Show 15
Overkill 48
Orbital 41
Outlaws 21
Orb 92
Old Dominion 9
O.A.R. 21
Orleans 17
Old 97's 26
Oingo Boingo 33
Omi 3
Ozric Tentacles 50
Of Mice & Men 15
Omarion 12
Ozark Mountain Daredevils 5
Ocean Colour Scene 40
Our Lady Peace 15
Orianthi 5
Odesza 10
OK GO 10
Obituary 24
Olafur Arnalds 20
Otherwise 7
Orgy 14
Omar & the Howlers 23
Our Last Night 24
Otep 10
Okkervil River 16
Ofra Haza 11
Oleta Adams 11
Odyssey 16
Of Montreal 25
Over The Rhine 25
Orange Goblin 9
Orange Juice 13
One Ok Rock 23
Oomph! 41
Ohio Express 4
Oh Wonder 12
Oysterband 10
Oriya
Omar 10
Omnia 15
Onslaught 12
Outsiders 7
Oh Land 9
Outasight 9
Outcast 4
Operation Ivy 5
The Ocean 20
Orden Ogan 9
Omen 10
Ozomatli 8
Orphaned Land 10
Orchid 9
Operation: Mindcrime 4
Os Mutantes 16
Ottawan 10
Obsession 7
One Night Only 4
Obscura 6
Other Lives 4
Ornella Vanoni 13
Otto Knows 3
Oceansize 21
Oh, Sleeper 5
OM 13
One Less Reason 7
O-Town 3
Offer Nissim 10
Oliver Koletzki 17
Oophoi 47
Odin 10
Old Man's Child 8
Oz 13
Oleander 4
Omnium Gatherum 12
Oceana 6
One Tree Hill
Oliver Heldens 2
Oscar And The Wolf 3
Orion 18
Ought 3- Offenbach 8
Ofenbach 4
Osanna 11
Owen Pallett 5
Oval 9
O.C. 8
— Artist has been update in past 30 days- Artist 3— Artist has more than two albums