Max Oazo
Songs: Flowers (remix) (& Bonzana & Miley Cyrus)
Leslie Odom Jr. Songs: Shape of My Heart (& Josh Groban) - Speak Now (One Night in Miami...)
Ofenbach (DJs)
Songs: Overdrive (& Norma Jean Martine) - Shivers (& Ed Sheeran) - Katchi (& Nick Waterhouse) - Be Mine - Party (& Lack Of Afro, Wax & Herbal T)
Jacques Offenbach Songs: Les Contes d'Hoffmann : Barcarolle (Belle nuit & ô nuit d'amour) - Can Can (Orphée aux Enfers) - La Vie parisienne : Rondo du brésilien
Oklahoma! (film) Songs: Oklahoma (Gordon MacRae, Charlotte Greenwood, James Whitmore, Shirley Jones & Jay C. Flippen)
Mike Oldfield
See also: Sally Oldfield
Songs: Moonlight Shadow (& Maggie Reilly) - To France (& Maggie Reilly) - Shadow on the Wall (& Roger Chapman) - Tubular Bells - Sailing (& Luke Spiller)
Mălina Olinescu Songs: Eu cred (Eurovision Romania)
OMC Songs: How Bizarre
One-T Songs: The Magic Key (& Cool-T)
Oliver Onions Songs: Dune Buggy (Altrimenti ci arrabbiamo)
Orchestral Manoeuvres in the Dark
OMD
Songs: Enola Gay - Souvenir - If You Leave (Pretty in Pink) - (Forever) Live and Die - Maid of Orleans (The Waltz Joan Of Arc)
Otis Day and the Knights
Musical film National Lampoon's Animal House
Songs: Shout - Shama Lama Ding Dong
OV7 Songs: Shabadaba - Enloquéceme (Lidia Ávila, Kalimba Marichal & Oscar Schwebel)