Genres
- Avant-Garde
- Blues
- Children's
- Classical
- Comedy/Spoken
- Country
- Easy Listening
- Electronic
- Folk
- International
- Jazz
- Latin
- New Age
- Pop/Rock
- R&B
- Rap
- Reggae
- Religious
- Stage & Screen
- Vocal
- Pop/Rock
One Direction 25
OneRepublic 49
Ozzy Osbourne 65
Oasis 47
Owl City 45
Olivia Newton-John 47
Olly Murs 17
Of Monsters And Men 9
Orchestral Manoeuvres In The Dark 34
Opeth 35
Old Crow Medicine Show 14
Overkill 48
Orbital 41
Outlaws 21
Orb 92
O.A.R. 21
Orleans 4
Old 97's 26
Oingo Boingo 33
Ozric Tentacles 50
Of Mice & Men 14
Omarion 11
Ozark Mountain Daredevils 5
Ocean Colour Scene 40
Orianthi 5
Our Lady Peace 14
OK GO 10
Obituary 24
Olafur Arnalds 20
Otherwise 6
Orgy 14
Omar & the Howlers 23
Otep 10
Okkervil River 16
Our Last Night 23
Ofra Haza 11
Oleta Adams 10
Odyssey 16
Of Montreal 24
Over The Rhine 25
Orange Goblin 9
Orange Juice 13
One Ok Rock 22
Ohio Express 4
Oysterband 10
Oriya
Omar 9
Omnia 15
Onslaught 12
Outasight 9
Oh Land 8
Outsiders 7
Outcast 4
The Ocean 20
Operation Ivy 5
Orphaned Land 10
Ozomatli 8
Omen 10
Orchid 9
Orden Ogan 9
Os Mutantes 16
Ottawan 10
One Night Only 4
Obsession 7
Obscura 6
Otto Knows 3
Other Lives 4
Oceansize 17
OM 13
Ornella Vanoni 19
One Less Reason 7
Oh, Sleeper 4
O-Town 3
Offer Nissim 10
Oophoi 47
Oceana 6
Oz 13
Odin 10
Old Man's Child 8
Oleander 4
One Tree Hill
Omnium Gatherum 11
Oliver Koletzki 16
Ought 3
Oscar And The Wolf 3
Owen Pallett 5
Osanna 11
Oval 9
Orion 17
Overland 6
O.C. 8
Oblivians 8
Odessa 4
OFF 2
One eskimO 2
One Day As A Lion
Overdrive 10
Orange Range 18
Otis Gibbs 6
— Artist has been update in past 30 days- Artist 3— Artist has more than two albums