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 65
Oasis 49
Owl City 45
Olivia Newton-John 47
Olly Murs 17
Of Monsters And Men 10
Orchestral Manoeuvres In The Dark 39
Opeth 38
Old Crow Medicine Show 15
Overkill 48
Orbital 41
Outlaws 21
Orb 92
O.A.R. 21
Old Dominion 8
Orleans 17
Old 97's 26
Omi 3
Oingo Boingo 33
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 6
Orgy 14
Omar & the Howlers 23
Otep 10
Our Last Night 23
Okkervil River 16
Ofra Haza 11
Oleta Adams 11
Odyssey 16
Of Montreal 24
Over The Rhine 25
Orange Goblin 9
Orange Juice 13
One Ok Rock 23
Oomph! 41
Ohio Express 4
Oh Wonder 11
Oysterband 10
Oriya
Omar 10
Omnia 15
Onslaught 12
Oh Land 9
Outasight 9
Outsiders 7
Outcast 4
Operation Ivy 5
The Ocean 20
Omen 10
Ozomatli 8
Orphaned Land 10
Orden Ogan 9
Orchid 9
Operation: Mindcrime 4
Os Mutantes 16
Ottawan 10
Obsession 7
One Night Only 4
Obscura 6
Other Lives 4
Otto Knows 3
Oh, Sleeper 5
Oceansize 21
Ornella Vanoni 13
OM 13
One Less Reason 7
O-Town 3
Offer Nissim 10
Oophoi 47
Old Man's Child 8
Odin 10
Oz 13
Oceana 6
Oleander 4
Oliver Koletzki 16
Omnium Gatherum 12
One Tree Hill
Oliver Heldens 2
Oscar And The Wolf 3
Ought 3
Orion 18- Offenbach 8
Owen Pallett 5
Ofenbach 4
Osanna 11
O.C. 8
Oval 9
— Artist has been update in past 30 days- Artist 3— Artist has more than two albums