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 52
Ozzy Osbourne 88
Oasis 51
Owl City 46
Olivia Newton-John 48
Olly Murs 17
Of Monsters And Men 10
Orchestral Manoeuvres In The Dark 39
Opeth 39
Old Crow Medicine Show 15
Overkill 48
Outlaws 23
Orbital 41
Orb 92
Old Dominion 9
O.A.R. 21
Orleans 17
Oingo Boingo 33
Old 97's 26
Ozric Tentacles 50
Omi 3
Of Mice & Men 15
Omarion 12
Ozark Mountain Daredevils 5
Ocean Colour Scene 40
Our Lady Peace 15
Orianthi 5
Odesza 11
OK GO 10
Obituary 24
Olafur Arnalds 20
Otherwise 8
Omar & the Howlers 23
Orgy 15
Our Last Night 25
Otep 11
Okkervil River 16
Ofra Haza 11
Oleta Adams 11
Odyssey 16
Of Montreal 25
Orange Goblin 10
Over The Rhine 25
Orange Juice 13
One Ok Rock 23
Oomph! 41
Ohio Express 4
Oh Wonder 12
Oysterband 12
Omnia 15
Onslaught 13
Omar 9
Oriya
Outsiders 7
Oh Land 9
Outcast 4
Outasight 9
Operation Ivy 5
The Ocean 20
Orden Ogan 9
Omen 10
Ozomatli 8
Orphaned Land 10
Orchid 9
Os Mutantes 20
Other Lives 5
Operation: Mindcrime 4
Ottawan 26
Ornella Vanoni 15
Obsession 7
One Night Only 4
Oceansize 21
Obscura 6
OM 13
Otto Knows 3
Oh, Sleeper 5
One Less Reason 8
O-Town 3
Offer Nissim 12
Oz 14
Oliver Koletzki 18
Odin 10
Oleander 6
Old Man's Child 8
Oophoi 47
Omnium Gatherum 12
Oceana 6
Oliver Heldens 2
Ofenbach 4
One Tree Hill
Orion 18
Owen Pallett 7
Oscar And The Wolf 3- Offenbach 8
Ought 3
Osanna 11
Oonagh 6
Oval 9
— Artist has been update in past 30 days- Artist 3— Artist has more than two albums