| Artist |
Number of songs |
| Oakenfold, Paul |
28 |
| Oak Pantheon |
16 |
| Oak, Winona |
22 |
| Oana Radu |
2 |
| OAR |
90 |
| O, Ashley |
3 |
| Oasis |
133 |
| Oathbreaker |
28 |
| Oathbringer |
11 |
| Obadiah Parker |
1 |
| OBB |
7 |
| Obel, Agnes |
60 |
| Oberhofer |
2 |
| Oberschlesien |
24 |
| Oberst, Conor |
61 |
| Obey The Brave |
44 |
| Obie Bermudez |
9 |
| Obie Trice |
6 |
| Obituary |
130 |
| Oblivion Myth |
8 |
| Oblomov, Vasja |
4 |
| O'Brien, Joseph |
1 |
| O'Brien, Olivia |
43 |
| Obscura |
75 |
| Obscurant |
9 |
| Obscure Sphinx |
22 |
| Obscurity |
62 |
| Obsequiae |
23 |
| Obsession |
31 |
| Obsidiots |
1 |
| Obtenebris |
11 |
| O.c.a.d. |
11 |
| OCB aka JensBens |
1 |
| OCD: Moosh & Twist |
1 |
| Ocean |
1 |
| Ocean (오션) |
6 |
| Oceana |
31 |
| Ocean Colour Scene |
159 |
| Ocean Drive |
5 |
| Ocean, Frank |
83 |
| Ocean Grove |
49 |
| Ocean Jet |
15 |
| Oceano |
59 |
| Ocean of Grief |
13 |
| Oceans |
40 |
| Oceans Ate Alaska |
72 |
| Oceans Divide |
11 |
| Oceansize |
12 |
| Oceans Red |
21 |
| Oceans, The |
1 |
| O.Children |
21 |
| Ochs, Phil |
86 |
| O'Connell, Lauren |
1 |
| O'Connell, Maura |
1 |
| O'Connor, Renee |
5 |
| O'Connor, Sinéad |
176 |
| Octavia Sperati |
21 |
| Octavio |
4 |
| Octavio Mesa |
1 |
| October Ends |
1 |
| October Fall |
12 |
| October Light |
3 |
| October Tide |
46 |
| Oda Nobuna no yabou |
2 |
| O'Day, Anita |
179 |
| O’Day, Aubrey |
6 |
| ODD |
1 |
| Odd Dimension |
15 |
| Oddział Zamknięty |
50 |
| Odell, Tom |
84 |
| Oden, Alexander |
34 |
| ODESZA |
54 |
| Odious Mortem |
20 |
| Odium |
32 |
| Odroerir |
29 |
| Odv, Timo |
3 |
| Odyn v kanoe |
1 |
| Odyssey |
14 |
| Oerding, Johannes |
58 |
| Ofdrykkja |
7 |
| Ofenbach |
17 |
| OFF |
1 |
| Off Bloom |
15 |
| Off By One |
1 |
| Offenbach Jacques |
3 |
| Officium Triste |
47 |
| Offonoff |
12 |
| Off road |
2 |
| Off Road Minivan |
16 |
| Offset |
6 |
| Offside |
7 |
| Offspring, The |
157 |
| OFF THE OCEAN |
2 |
| Off With Their Heads |
65 |
| Of Machines |
10 |
| Of Men And Wolves |
2 |
| Of Mice & Men |
89 |
| Of Monsters and Men |
47 |
| Of Montreal |
116 |
| Ofsoski |
1 |
| Of the Wand & the Moon |
29 |
| Of Virtue |
47 |
| Ogada, Ayub |
1 |
| Ogata Megumi |
8 |
| OG Maco |
1 |
| Oh, Atoms |
1 |
| Oh Be Clever |
1 |
| Oh, Boy Les Mecs |
2 |
| Oh child! |
1 |
| Ohdapo |
1 |
| Oh Gravity |
9 |
| Oh Hiroshima |
6 |
| Oh Honey |
6 |
| Ohio Express |
15 |
| Ohio Players |
11 |
| Oh Land |
61 |
| Ohm Square |
12 |
| Oh My! |
1 |
| Oh My Girl |
112 |
| Oh No Oh My |
1 |
| Ohnuki, Taeko |
1 |
| O'Hooley & Tidow |
17 |
| Oh Sleeper |
49 |
| Oh Snap It's Luke! |
11 |
| Ohtar |
0 |
| Oh The Larceny |
17 |
| Oh Wonder |
68 |
| OhYe Rabble Rouser |
2 |
| Oidoxie |
7 |
| Oikonomopoulus, Nikos |
1 |
| Oingo Boingo |
1 |
| Oi Polloi |
71 |
| Oi! se Arma |
37 |
| Oi va voi |
1 |
| Oja, Paul |
1 |
| O'jays |
14 |
| OJ DA JUICEMAN |
18 |
| Ojla Bajrami |
1 |
| Okasian |
1 |
| OKAY |
1 |
| Okean Elzy |
16 |
| OK Go |
53 |
| Okilly Dokilly |
14 |
| Okkervil River |
69 |
| Oksana Pochepa |
1 |
| Oladokun, Joy |
47 |
| Oláh, Ibolya |
2 |
| Ola Nizio |
1 |
| Olas |
2 |
| Ola Svensson |
25 |
| Olav Basoski |
1 |
| O.L.D |
24 |
| Old Caltone |
1 |
| Oldcodex |
40 |
| Old Crow Medicine Show |
3 |
| Old Dominion |
13 |
| Oldelaf |
3 |
| Oldfield, Mike |
100 |
| Oldfield, Terry |
10 |
| Old Gray |
26 |
| Ol' dirty bastard |
3 |
| Old Man's Child |
59 |
| Old Metropolitan Band |
2 |
| Old Silver Key |
7 |
| Old Trees |
8 |
| Oleander |
35 |
| Oleg Kenzov |
1 |
| Oleg Kvasna |
1 |
| O, Lil' |
53 |
| Oli P |
25 |
| Olive |
4 |
| Oliveira, Reese |
1 |
| Olivera |
1 |
| Oliver Boyd & The Remembralls |
8 |
| Oliver Francis |
25 |
| Oliver Hazard |
2 |
| Oliver Heldens |
31 |
| Olivero, Carlito |
11 |
| OLIVER (Vocaloid) |
16 |
| Olivia |
12 |
| Olivia Broadfield |
1 |
| Olivia Noelle |
6 |
| Olivia Ong |
2 |
| Olivia Wieczorek |
2 |
| Olja Karleusa |
1 |
| Olja Poljakova |
6 |
| Oller, Tony |
1 |
| Ollie |
41 |
| Ollie MN |
1 |
| Ollie Wade |
1 |
| Olli Herman |
1 |
| Olli Schlulz |
2 |
| Olsen, Angel |
72 |
| Olsen Brothers |
15 |
| Olson |
13 |
| Olson, Olivia |
4 |
| Olusola, Kevin "K.O." |
29 |
| Olympos mons |
21 |
| Olzon, Anette |
31 |
| Om |
18 |
| Omar Afuni |
31 |
| Omarion |
42 |
| Omar LinX |
1 |
| Omc |
1 |
| OMD |
157 |
| O'Meara, Jo |
17 |
| Omega |
325 |
| Omega el Fuerte |
4 |
| Omega Lithium |
22 |
| Omega X |
32 |
| Omen |
65 |
| OmenXIII |
9 |
| Omer Bhatti { O-Bee } |
8 |
| Omer Inayat |
1 |
| OMFG |
4 |
| Omg Girlz |
4 |
| OMI |
19 |
| Omit |
8 |
| Omloop,Laura |
1 |
| Omnia |
110 |
| Omnia & IRA |
1 |
| Omnimar BIO |
45 |
| Omnium Gatherum |
85 |
| Omri |
1 |
| ON |
25 |
| O.N.A. |
35 |
| On And On |
1 |
| On an on |
5 |
| Onar |
2 |
| Onar & Ośka |
10 |
| Once Human |
32 |
| Onda Vaselina |
5 |
| Ondra, Jakub |
17 |
| One, Albert |
1 |
| O'Neal, Jamie |
29 |
| One Bit |
6 |
| One Chance |
20 |
| One Day As A Lion |
5 |
| One Desire |
20 |
| One Direction |
137 |
| One Eyed Doll |
5 |
| One Fine Day |
11 |
| One For The Team |
1 |
| O'Neil, Melissa |
12 |
| One Less Reason |
33 |
| Onelight |
4 |
| One More Time |
44 |
| One night band |
2 |
| One Night Only |
23 |
| One Ok Rock |
175 |
| OneRepublic |
104 |
| One Rock |
4 |
| One Star Story |
7 |
| One-T |
23 |
| One time |
4 |
| One Tin Soldier |
1 |
| One Two |
3 |
| Oneus |
66 |
| ONE VOICE |
24 |
| One Voice Children´s Choir |
1 |
| Onew |
15 |
| One Way System |
35 |
| Onewe |
9 |
| One Without |
34 |
| ONF |
55 |
| Oni |
8 |
| ONI INC. |
1 |
| Onions, Oliver |
136 |
| Oniromantic |
8 |
| Onision |
6 |
| Onision Songs |
1 |
| Onitsuka, Chichiro |
2 |
| Onlap |
13 |
| OnlyOneOf |
27 |
| Only Shadows |
3 |
| Only The Poets |
9 |
| Only this time |
5 |
| On My Knees |
0 |
| Onmyouza |
2 |
| Onoe Caponoe |
1 |
| On/off |
33 |
| Onono Ben |
1 |
| Onslaught |
63 |
| Onslow |
3 |
| Onward |
18 |
| Onward to Olympas |
10 |
| ONY |
1 |
| Onyria |
16 |
| Onyx |
11 |
| Oodi |
2 |
| Ooes |
20 |
| Ookami shoujo to kuro ouji |
1 |
| Oomph! BIO |
226 |
| Oona |
1 |
| Oonagh |
54 |
| Ootsuki Kenji |
2 |
| Opal In Sky |
4 |
| Opca Opasnost |
2 |
| Open Fire |
9 |
| Open Kids |
5 |
| Open Season |
1 |
| Operadyse |
10 |
| Opera IX |
47 |
| Opera Magna |
21 |
| Opera Romeo Et Juliette |
48 |
| Operatika |
11 |
| Operation Ivy |
32 |
| Operation M.D., The |
20 |
| Operator |
1 |
| Opeth |
126 |
| Opium Project |
1 |
| Opposite Earth |
10 |
| Opposites, The |
14 |
| Optimus |
1 |
| Opus |
19 |
| Opus Atlantica |
9 |
| OR3O |
1 |
| Oracles |
11 |
| Oracle Sun |
9 |
| Orange Blue |
29 |
| Orange Goblin |
83 |
| Orange Range |
30 |
| Orange Skyline |
1 |
| Oranssi Pazuzu |
23 |
| Ora, Rita BIO |
62 |
| Ora The Molecule |
19 |
| Oratory |
21 |
| Orava, Pikku |
5 |
| Orbakaite, Kristina |
3 |
| Orbion |
1 |
| Orbison, Roy |
337 |
| Orbital |
4 |
| Orbit Culture |
44 |
| Orbs |
4 |
| Orchestral Manoeuvres In The Dark |
71 |
| Orchid |
30 |
| Orcivus |
17 |
| Ordained Fate |
9 |
| Orden Ogan |
75 |
| Ordinance |
12 |
| Ordinary Boys, The |
6 |
| Ord, Maren |
13 |
| Ordo Rosarius Equilibrio |
22 |
| Oreiro, Natalia |
91 |
| Orelia Has Orchestra |
1 |
| OrelSan |
28 |
| Ore Ska Band |
5 |
| Organ, The |
11 |
| Orgasm Death Gimmick |
2 |
| Orgy |
37 |
| Orhan, Mahmut |
5 |
| Orianthi |
53 |
| Origa |
21 |
| Origami |
2 |
| Origene |
1 |
| Origin |
70 |
| Original Alpenland Quintett |
4 |
| Original Broadway Cast |
39 |
| Original Sin (US) |
9 |
| Orion Child |
15 |
| Orion Riders |
10 |
| Orion's Reign |
22 |
| Orion the Hunter |
9 |
| Orishas |
24 |
| Orjan Nilsen |
2 |
| Orlando, Johnny |
93 |
| Orlando, Tony |
2 |
| Ormonde |
1 |
| Ornatos Violeta |
2 |
| Orochi |
2 |
| Orphanage |
47 |
| Orphaned Land |
72 |
| Orphan Gypsy |
11 |
| Orpheus Omega |
36 |
| Orrantia, Hayley |
2 |
| Orrico, Stacie |
54 |
| Orson |
10 |
| Ort, Andreas |
1 |
| Ortega, Jeannie |
15 |
| Ortega, Michael |
1 |
| Orthodox Celts |
67 |
| Ortiz, Joell |
51 |
| Orton Beth |
1 |
| Orwells, The |
35 |
| Osatia |
2 |
| Osborne, Anders |
10 |
| Osborne, Jeffrey |
31 |
| Osborne, Joan |
75 |
| Osbourne, Kelly |
23 |
| Osbourne, Ozzy |
163 |
| Oscar, Alexander |
3 |
| Oscar And The Wolf |
38 |
| O'Shaughnessy, Ryan |
7 |
| O'Shine, Simon |
1 |
| Osho, Josh |
4 |
| OSI |
5 |
| Osibisa |
5 |
| Osiris |
7 |
| Ośka |
8 |
| Oskari14 |
1 |
| Oskord |
6 |
| Oslo Gospel Choir |
11 |
| Osment, Emily |
31 |
| Osmond, Donny |
3 |
| Osmond, Jimmy |
1 |
| Osmond, Little Jimmy |
1 |
| Oso Oso |
39 |
| Ossian |
77 |
| OST - 13 Reasons Why 3 |
3 |
| Ost+Front |
92 |
| O.S.T.R |
43 |
| O'Sullivan, Gilbert |
27 |
| Osviss |
1 |
| Otava Yo |
14 |
| OT Bend |
1 |
| Otep |
93 |
| O Terno |
26 |
| O.T. Genasis |
14 |
| Other Lives |
22 |
| Other Way |
1 |
| Otherwise |
69 |
| Otis Redding |
123 |
| Otis Stacks |
8 |
| Otnicka |
1 |
| O. Torvald |
3 |
| O-Town |
14 |
| Otsuka, Ai |
9 |
| Ott |
11 |
| Ottaviani, Giuseppe |
6 |
| Ottawan |
15 |
| Ott, Kerstin |
4 |
| Otto Dix |
4 |
| Otto Le Blanc |
1 |
| Otto's Daughter |
1 |
| Ouchène,Patrick |
1 |
| Ought |
29 |
| Ouled Jouini |
1 |
| Our Common Sense |
10 |
| Our Hollow Our Home |
63 |
| Our Lady Peace |
48 |
| Our Last Night |
191 |
| Our Mirage |
35 |
| Ouroboros |
19 |
| Ours |
30 |
| Our Waking Hour |
12 |
| Outasight |
4 |
| Outblast |
8 |
| Outbreakband |
6 |
| Out Came The Wolves |
13 |
| Outfields, The |
1 |
| Outhere Brothers, The |
3 |
| Outkast |
145 |
| Outlander |
1 |
| Outlandish |
12 |
| Outlaws |
58 |
| Outlawz |
20 |
| Outline In Color |
82 |
| Outlines |
1 |
| Outloud |
9 |
| Outsider (korean rapper) |
2 |
| Out With The Old |
3 |
| Outwork feat Mr. Gee |
1 |
| Outworld |
9 |
| Over Atlantic |
4 |
| Overdeth |
12 |
| Overdose |
58 |
| Overdream |
1 |
| Overdrive |
30 |
| Overflow |
10 |
| Overground |
6 |
| Overhype |
15 |
| Overkill |
202 |
| Overlaps |
1 |
| Overlife |
12 |
| Overload |
31 |
| Overload Generation |
2 |
| Overload ( Grece ) |
10 |
| Overlord |
31 |
| Overscene |
1 |
| Overseer, The |
21 |
| Overstreet, Chord |
17 |
| Over The Ocean |
18 |
| Over The Rhine |
6 |
| Overtones |
3 |
| Overwind |
10 |
| Overworld |
7 |
| Ov HELL |
8 |
| Owari no Seraph |
1 |
| Owen, Jake |
49 |
| Owen, Mark |
69 |
| Owens, Ginny |
2 |
| Owens, Tim Ripper |
12 |
| Owl City |
203 |
| Owlle |
24 |
| OXA |
6 |
| Oxenryd,Sandra |
1 |
| Ox, Matt |
4 |
| Oxxxymiron |
61 |
| Oxymoron |
61 |
| Oyster Band |
13 |
| Oysterhead |
13 |
| OZ |
46 |
| Ozark Mountain Daredevils |
65 |
| Ozcan, Ummet |
0 |
| OZMA |
32 |
| O-Zone |
12 |
| Ozuna |
130 |
| Ozza |
1 |
| Ozzie |
2 |
