TJ O'Neill Songs: A Pirate Looks at 40 (& Stick Figure, KBong & Johnny Cosmic)
Max Oazo
Songs: Flowers (remix) (& Miley Cyrus & Bonzana)
Odetari Songs: Keep Up
Leslie Odom Jr. Songs: Speak Now (One Night in Miami...) - Shape of My Heart (& Josh Groban)
Esther Ofarim Songs: Morning Of My Life (& Abi Ofarim)
Ofenbach (DJs) Songs: Katchi (& Nick Waterhouse) - Be Mine - Overdrive (& Norma Jean Martine) - Shivers (& Ed Sheeran) - Hurricane (& Ella Henderson)
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
Official Hige Dandism (Official髭男dism) Songs: Pretender (The Confidence Man JP) - Cry Baby (Tokyo Revengers)
Oklahoma! (film) Songs: Oklahoma (Gordon MacRae, Charlotte Greenwood, James Whitmore, Shirley Jones & Jay C. Flippen)
Oldelaf
Songs: La tristitude - Et si on chantait (& Monsieur D.) - Le café (& Monsieur D.) - C'est Michel
Mike Oldfield Songs: Moonlight Shadow (& Maggie Reilly) - Nuclear (feat. Luke Spiller) - Sailing (& Luke Spiller) - To France (& Maggie Reilly) - Tubular Bells
Olly Murs
Oliver "Olly" Stanley Murs
Songs: Save Me - Dance with Me Tonight - Oh My Goodness - Hand On Heart - Up (& Demi Lovato)
OMC Songs: How Bizarre
One-T Songs: The Magic Key (& Cool-T)
Onyx Songs: Slam
Rita Ora
Songs: Love Ain't It (& Kylie Cantrall, Brandy & Malia baker) - Your Song - Black Widow (& Iggy Azalea) - Let You Love Me - Carry On (& Kygo)
Otis Day and the Knights
Musical film National Lampoon's Animal House
Songs: Shout - Shama Lama Ding Dong
OutKast
Songs: Rosa Parks - Hey Ya! (Radio Mix - Club Mix) - Roses (& Big Boi) - Prototype - Ms. Jackson
The Outsiders (musical) Songs: Stay Gold (Sky Lakota-Lynch & Brody Grant)
OV7
Also known as La Onda Vaselina
Songs: Te quiero tanto, tanto - Enloquéceme (Lidia Ávila, Kalimba Marichal & Oscar Schwebel) - Shabadaba