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O-o-h Child
"O-o-h Child" is a 1970 soft-soul single by Chicago family group the Five Stairsteps, written by Stan Vincent, Buddah 165; it peaked at No. 8 Hot 100, No. 14 R&B, sold a million copies, and is their signature song.
O-Town
O-Town is an American boy band formed in 2000 on ABC's Making the Band with Lou Pearlman, signed by Clive Davis to J Records, known for "Liquid Dreams" and "All or Nothing", broken up 2003, reunited 2013.
O-Zone
O-Zone, a Moldovan Eurodance trio formed in 1999 in Chișinău by Dan Bălan, disbanded in 2005. Known for "Dragostea din Tei" (the Numa Numa song), number 1 in 32 countries and over 12 million copies sold.
O.A.R.
O.A.R. (Of a Revolution), American rock band formed 1996 in Rockville, Maryland; rock-reggae college jam act behind "That Was a Crazy Game of Poker" and "Shattered," ten studio albums, and the 2026 Three Decades Tour.
O.F.T.B.
O.F.T.B. (Operation from the Bottom) was a Watts, Los Angeles gangsta rap group (1990-2013) of Flipside, Bust Stop, and Low M.B., known for Straight Up Watts (1992) and Death Row soundtrack appearances.
Oasis (band)
Oasis, English rock band formed in Manchester in 1991, originally The Rain, led by Liam and Noel Gallagher; Britpop leaders behind Definitely Maybe and (What's the Story) Morning Glory?, split 2009, reunited for the 2025 Live '25 tour.
Oasis discography
Oasis discography: seven UK number-one studio albums (1994–2008) by the Manchester Britpop band, plus The Masterplan, Familiar to Millions, Stop the Clocks, Time Flies, 27 singles, 70 million albums sold, and 2025 reunion reissues.
Ocean Colour Scene
Ocean Colour Scene (OCS) are an English Britpop band formed in Moseley, Birmingham in 1989, known for Moseley Shoals (1996), The Riverboat Song, and Marchin' Already (1997), which topped the UK album chart.
October London
October London (Jared Samuel Erskine, born 1986, South Bend, Indiana) is an American retro-soul and R&B singer signed by Snoop Dogg to Cadillacc Music and Death Row Records, known for The Rebirth of Marvin and the 2023 number-one Adult R&B single Back To Your Place.
Odeal
Odeal (Hillary Dennis Udanoh) is a British-Nigerian R&B/Afrobeats singer-producer from London, born in Germany and raised across Spain, Nigeria, and the UK; MOBO-winning independent artist behind "Miami" and "Soh-Soh."
Odetta
Odetta (Odetta Holmes, 1930-2008), American folk singer and contralto called the Voice of the Civil Rights Movement; her 1956 debut Odetta Sings Ballads and Blues turned Bob Dylan toward folk, and she sang at the 1963 March on Washington.
Odeya (אוֹדֶיָּה אזולאי)
Odeya Azoulay (אודיה אזולאי), stage name Odeya, Israeli singer-songwriter born 2001 in Bat Yam; broke through with "Or" (2020), released four albums, won ACUM awards, Forbes 30 Under 30 2024.
Of Monsters and Men
Of Monsters & Men is an Icelandic indie folk band formed in 2010, best known for the hit single "Little Talks" and the album My Head Is an Animal.
Of Montreal
Of Montreal: American indie pop band from Athens, Georgia, founded by Kevin Barnes in 1996 within the Elephant 6 collective; twenty studio albums from Cherry Peel (1997) to aethermead (2026), known for theatrical live shows.
Ofra Haza (עפרה חזה)
Ofra Haza (עפרה חזה, 1957–2000), Israeli singer and actress from Tel Aviv's Hatikva quarter; Eurovision 1983 runner-up with "Chai"; fused Yemenite Jewish song with electronic dance music; "Im Nin'alu" sold over three million copies; Grammy-nominated for Kirya (1992).
Oh Wonder
Oh Wonder are a London alt-pop duo of Josephine Vander Gucht and Anthony West who released one SoundCloud song monthly from 2014, self-produced the 2015 debut Oh Wonder, Ultralife, 22 Break, and 22 Make.
Ohio Express
The Ohio Express, a Mansfield, Ohio bubblegum pop band renamed from Sir Timothy & the Royals by Super K Productions, scored 1968 hits Yummy Yummy Yummy (US No. 4) and Chewy Chewy, largely recorded by studio musicians, and still tours under founding member Tim Corwin.
Oingo Boingo
Oingo Boingo, also known late in its career as Boingo, was a Los Angeles new wave band (1979–1995) led by Danny Elfman, descended from the Mystic Knights theatrical troupe, best known for Dead Man's Party and Weird Science.
OK Go
OK Go: American rock band formed in Chicago in 1998 (Damian Kulash, Tim Nordwind, Dan Konopka, Andy Ross), known for viral single-take videos like the 2006 treadmill clip "Here It Goes Again" and albums Oh No, Hungry Ghosts, and And the Adjacent Possible (2025).
Okkervil River
Okkervil River is an indie rock band formed in 1998 in Austin, Texas, led by Will Sheff and named for a Tatyana Tolstaya story; known for Black Sheep Boy (2005), The Stage Names, and nine studio albums through In the Rainbow Rain (2018).
Oksana Grigorieva (Оксана Петровна Григорьева)
Oksana Grigorieva (Оксана Петровна Григорьева), born 1970 in Saransk, is a Russian-born pianist, singer, and songwriter known for the 2009 album Beautiful Heartache on Mel Gibson's Icon label and for writing Josh Groban's "Un día llegará"; distinct from the Kremlin Ballet ballerina and the Moscow drummer of the same name.
Ólafur Arnalds
Ólafur Arnalds (born 1986, Mosfellsbær, Iceland) is a neo-classical composer, multi-instrumentalist, and producer on Erased Tapes, half of the techno duo Kiasmos, and scorer of Broadchurch, Another Happy Day, and Surface.
Old 97's
The Old 97's are an American rock band formed in 1992 in Dallas, Texas, fronted by Rhett Miller and known as pioneers of the 1990s alternative country movement.
Old Crow Medicine Show
Old Crow Medicine Show is a Nashville-based, two-time Grammy-winning American old-time string band formed in 1998, known for "Wagon Wheel" (Bob Dylan/Ketch Secor), Grand Ole Opry membership since 2013, and the 2026 album Union Made.
Old Dominion (band)
Old Dominion is an American country band formed in Nashville in 2007, named for Virginia's nickname. Members Ramsey, Rosen, Tursi, Sprung, and Sellers have nine No. 1 Country Airplay hits, seven straight CMA Vocal Group of the Year wins, and eight ACM Group of the Year awards.
Old Mervs
Old Mervs: Australian indie rock duo from Kojonup, Western Australia, of David House (guitar, vocals) and Henry Carrington-Jones (drums); debut album Old Mervs (2025) topped the ARIA Australian chart, second album Carparks released 2026.
Old-time music
Old-time music: pre-1940s American fiddle-and-banjo string-band dance music, rooted in Anglo-Irish melody and African-American rhythm, distinct from bluegrass (no solo breaks), recorded as 'hillbilly' music in the 1920s and sustained today by jams and festivals.
Ole 60
Ole 60 is an American country band from Kentucky founded by Jacob Young and Tristan Roby, who broke out with the 2023 EP three twenty four.
Oleksandr Bilash
Oleksandr Bilash (Олександр Білаш, 1931–2003) was a Ukrainian composer and poet best known for lyrical songs such as "Dva kol'ory" and "Iaseny," honored as Hero of Ukraine.
Oleta Adams
Oleta Adams (born 1953, Seattle) is an American gospel-rooted soul, jazz, and pop singer-pianist, discovered by Tears for Fears in a Kansas City hotel bar, known for "Woman in Chains" and "Get Here."