# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All  
Obiet Panggrahito
Okernkirchner Kinderchor (Obernkirchen Children's Choir) - Mixed
Olavsguttene
Old Skull
Ole Hegelund Nielsen
Oleg Pronchatov (Олег Прончатов)
Oleg Sidorov (Олег Сидоров)
Oliver Grimm
Oliver Lepage-Dean (St. John's College, Cambridge)
Oliver Morris
Oliver Richman
Oliver Sammons
Oliver!, Lionel Bart's Musical
Olivier Bonneur
Omar Arnaout
Omar Cruz
Omero Mumba
Once Were Christmas Angels
One Direction
Only Boys Aloud
Oosterhoutse Nachtegalen
Oratory Preparatory School Choir
Orfeon Infantil Mexicano
Orjan Olsson
Orlando Deanery Boychoir
Orpheus Boys Choir
Os Abelhudos (Mixed group)
Os Gêmeos - Mateus & Lucas
Os Minos
Os Pequenos Cantores da Guanabara
Osamu Minagawa
Oslo Domkirkes Guttekor
Osmond Boys
Osmond Brothers
Osmonds, the
Osorio
Ossama
Ossi & Antti Kinnumen
Our Kid
Outl4w
Owen Mac
Oxford Children Choir, The