| Artist |
Number of songs |
| O Town |
9 |
| O'Connor, Renee |
5 |
| O'Connor, Sinead |
126 |
| O'day, Anita |
36 |
| O'jays |
14 |
| O'Meara, Jo |
17 |
| O'Shaughnessy, Ryan |
7 |
| O, Lil' |
53 |
| O-Town |
14 |
| O-zone |
19 |
| O.L.D |
24 |
| O.N.A. |
35 |
| O.s.t.r |
41 |
| O.S.T.R. |
1 |
| Oak Ridge Boys |
12 |
| OAR |
89 |
| Oasis |
99 |
| Obadiah Parker |
1 |
| Obama Girl |
2 |
| OBAN - nebeské lodě |
5 |
| Obel, Agnes |
9 |
| Oberhofer |
1 |
| Obey The Brave |
10 |
| Obie Bermudez |
9 |
| Obie Trice |
5 |
| Obituary |
73 |
| Oblomov |
1 |
| Obrázky |
10 |
| Obrázky od Sel Gomez |
4 |
| Obscura |
27 |
| Obscura Camera |
1 |
| Obscurant |
9 |
| Obscurity |
31 |
| Obsession |
21 |
| Ocean Colour Scene |
25 |
| Ocean Drive |
4 |
| Ocean Girls |
0 |
| Oceana |
28 |
| Oceano |
25 |
| Oceans Ate Alaska |
8 |
| Oceans Divide |
11 |
| Oceansize |
12 |
| Octavia Sperati |
20 |
| October Fall |
12 |
| October Light |
2 |
| Oda Nobuna no yabou |
2 |
| Oddział Zamknięty |
50 |
| Odell, Tom |
7 |
| Odium |
23 |
| Odyssey |
11 |
| Of machines |
1 |
| Of Mice & Men |
27 |
| Of Monsters & Men |
15 |
| Of the Wand & the Moon |
13 |
| Off By One |
1 |
| Off with their heads |
1 |
| Offenbach |
4 |
| Offenbach Jacques |
1 |
| OfficialJaden |
2 |
| Officium triste |
39 |
| Offishall,Kardinal |
9 |
| Offside |
7 |
| Offspring, The |
127 |
| Ofsoski |
1 |
| Ogata Megumi |
8 |
| Oh Land |
11 |
| Oh my darling |
5 |
| Oh My! |
1 |
| Oh no! Oh my! |
1 |
| Oh, Sleeper |
33 |
| Ohio Express |
2 |
| Ohio Players |
11 |
| OI' Dirty Bastard |
0 |
| Oidoxie |
6 |
| Oingo Boingo |
109 |
| Oizo |
4 |
| OJ DA JUICEMAN |
18 |
| OK Go |
39 |
| OK! Punk |
0 |
| Okean Elzy |
3 |
| Okkervil river |
1 |
| Ola Svensson |
22 |
| Olav Basoski |
1 |
| Old 97`s |
52 |
| Old 97´s |
1 |
| Old Boys |
1 |
| Old Crow Medicine Show |
1 |
| Old Dead Tree, The |
34 |
| Old Man's Child |
58 |
| Oldelaf |
1 |
| Oldfield, Mike |
85 |
| OLEANDER |
34 |
| Oli P |
25 |
| Olive |
3 |
| Oliver Boyd & The Remembralls |
4 |
| Oliver dragojevič |
1 |
| Oliver James |
9 |
| Oliver Riedel |
0 |
| Oliver Sykes |
0 |
| Olivia |
12 |
| Olivia Archbold |
0 |
| Olivia Broadfield |
1 |
| Olivia Newton John |
151 |
| Olivia Noelle |
6 |
| Olivia Ong |
1 |
| Olsen Brothers |
1 |
| Olsens Twins |
8 |
| Olson, Olivia |
4 |
| Olta Boka |
1 |
| Olympos mons |
21 |
| Olzon, Anette |
6 |
| Om |
18 |
| Omar Afuni |
31 |
| Omarion |
19 |
| Omc |
1 |
| OMD |
95 |
| Omega |
251 |
| Omega el Fuerte |
4 |
| Omega Lithium |
23 |
| Omen |
56 |
| Omer Bhatti { O-Bee } |
7 |
| Omer Inayat |
1 |
| Omg Girlz |
3 |
| Omloop,Laura |
1 |
| Omnia |
56 |
| Omnia & IRA |
1 |
| ON AN ON |
2 |
| On My Knees |
0 |
| ON/OFF |
9 |
| Onar & Ośka |
10 |
| Onda Vaselina |
5 |
| One Band |
0 |
| One Chance |
20 |
| One Direction |
79 |
| One Direction/Little Mix |
2 |
| One Eyed Doll |
4 |
| One Fine Day |
11 |
| One For The Team |
1 |
| One Less Reason |
39 |
| One More Time |
5 |
| One night band |
1 |
| One Night Only |
27 |
| One Ok Rock |
80 |
| One Piece |
74 |
| One Rock |
4 |
| One star story |
7 |
| One T & Cool T |
6 |
| One time |
4 |
| One Tin Soldier |
1 |
| ONE VOICE |
24 |
| One Way System |
35 |
| One, Albert |
1 |
| One-T |
16 |
| Onelight |
4 |
| OneRepublic |
59 |
| Onions, Oliver |
9 |
| Onision |
4 |
| Onitsuka, Chichiro |
1 |
| Onmyouza |
2 |
| Onono Ben |
1 |
| Onyx |
8 |
| Oomph! |
174 |
| Oona |
1 |
| Opca Opasnost |
2 |
| Open Season |
1 |
| Opera IX |
34 |
| Operation Ivy |
32 |
| Operation M.D., The |
20 |
| Opeth |
80 |
| Opium Project |
1 |
| Oprah show |
0 |
| Optimus |
1 |
| Optimus Prime |
1 |
| Opus |
21 |
| Orange Blue |
29 |
| Orange County Girl |
1 |
| Orange Goblin |
69 |
| Orange Range |
30 |
| Oranssi Pazuzu |
10 |
| Oratory |
22 |
| Orbakaite, Kristina |
3 |
| Orbison, Roy |
281 |
| Orbital |
3 |
| Orbs |
4 |
| Orchestra, Manchester |
34 |
| Orchestral Manoeuvres In The Dark |
4 |
| Orcivus |
16 |
| Ord, Maren |
13 |
| Ordinary Boys, The |
6 |
| Ore Ska Band |
5 |
| Oreiro, Natalia |
54 |
| Orelia Has Orchestra |
1 |
| OrelSan |
11 |
| Organ, The |
11 |
| Orgy |
35 |
| Orianthi |
26 |
| Origin |
47 |
| Original Alpenland Quintett |
4 |
| Original Broadway Cast |
39 |
| Orion's Reign |
12 |
| Orishas |
24 |
| Orjan Nilsen |
2 |
| Orla Gartland |
12 |
| Orlando, Tony |
2 |
| Ornatos Violeta |
2 |
| Orochi |
2 |
| Oroku |
1 |
| Orphanage |
47 |
| Orphaned Land |
24 |
| Orrico, Stacie |
40 |
| Orson |
2 |
| Ortega, Jeannie |
15 |
| Ortega, Michael |
1 |
| Orthodox Celts |
4 |
| Ortiz, Joell |
51 |
| Orton Beth |
1 |
| Osborne, Jeffrey |
31 |
| Osborne, Joan |
75 |
| Osbourne, Kelly |
23 |
| Osho, Josh |
4 |
| OSI |
5 |
| Osibisa |
4 |
| Osment, Emily |
32 |
| OST |
8 |
| Ostatní oblíbené písně |
0 |
| OT Bend |
1 |
| Otep |
60 |
| Other Lives |
2 |
| Otherwise |
9 |
| Otis Redding |
119 |
| Otis Taylor |
1 |
| Otravný pomeranč |
0 |
| Ott |
11 |
| Ottaviani, Giuseppe |
5 |
| Ottawan |
6 |
| Otto Dix |
4 |
| Otto's Daughter |
1 |
| Ouchène,Patrick |
1 |
| Ouled Jouini |
1 |
| Our Lady Peace |
50 |
| Our Last Night |
33 |
| Ouran high school Host club |
1 |
| Ours |
30 |
| Out Of Eden |
48 |
| Outasight |
2 |
| Outblast |
8 |
| Outfield, The |
1 |
| Outhere Brothers, The |
3 |
| Outkast |
118 |
| Outlandish |
9 |
| Outlawz |
20 |
| Outlines |
1 |
| Outloud |
9 |
| Outsider (korean rapper) |
2 |
| Outwork feat Mr. Gee |
1 |
| Ov HELL |
8 |
| Over The Rhine |
5 |
| Overdream |
1 |
| Overflow |
10 |
| Overground |
6 |
| Overhype |
15 |
| OverKill |
160 |
| Overseer |
4 |
| Overstreet, Chord |
10 |
| Overtone |
1 |
| Overtones |
3 |
| Overworld |
5 |
| Ovi |
1 |
| Owen, Jake |
30 |
| Owen, Mark |
33 |
| Owl City |
86 |
| OXA |
5 |
| Oxenryd,Sandra |
1 |
| Oxymoron |
63 |
| Oyster Band |
13 |
| Oyuugi Wagamama-dan x PaRADEiS |
4 |
| OZMA |
32 |
| O´neal, Jamie |
22 |
| Ośka |
8 |
