| | O Brother, Where Art Thou? Songs: I Am A Man Of Constant Sorrow (Soggy Bottom Boys) |
| | Des O'Connor Songs: I Pretend · Careless Hands · 1-2-3 O'Leary · Dick-A-Dum-Dum |
| | Hazel O'Connor Songs: Will You |
 | Sinéad O'Connor |
| Songs: Nothing Compares 2 U · Why Don't You Do Right? · Illegal Attacks (with Ian Brown) |
| | Colby O'Donis Songs: What You Got (feat. Akon) · Just Dance (with Lady GaGa) · Beautiful (with Akon & Kardinal Offishall) |
| Daniel O'Donnell |
| Songs: Danny Boy · Isle Of Innisfree · Crush On You · The Wedding Song |
| | Erin O'Donnell Songs: No Place So Far |
| The O'Jays |
| Songs: Love Train · Use Ta Be My Girl · For The Love Of Money · Livin' For The Weekend |
| | The O'Kaysions Songs: Girl Watcher |
| | Danny O'Keefe Songs: Good Time Charlie's Got The Blues |
| | Alexander O'Neal Songs: Criticize |
| Jamie O'Neal |
| Songs: There Is No Arizona · Somebody's Hero · Trying To Find Atlantis · Like A Woman · Soldier Comin' Home |
| | Gilbert O'Sullivan Songs: Alone Again (Naturally) · Nothing Rhymed · Matrimony · Get Down · Clair |
| | O-Town Songs: All Or Nothing · We Fit Together · These Are The Days · Baby I Would · Liquid Dreams |
| | O-Zone Songs: Dragostea Din Tei (Haiducii) · Despre Tine |
| | The Oak Ridge Boys Songs: Elvira · Trying To Love Women · American Made · Come On In · Sail Away |
| Oasis |
Noel Gallagher & Liam Gallagher
See also: Beady Eye
Songs: Wonderwall · Don't Look Back In Anger · Stop Crying Your Heart Out · Champagne Supernova · D'you Know What I Mean |
| | Agnes Obel Songs: Riverside |
| | Stefan Oberhoff Songs: Merci, Daß Es Dich Gibt |
| | Pascal Obispo Songs: L'important c'est d'aimer · Tu m'avais dit · Rosa · Millésime · Sa raison d'être (Live Fan) |
| | Ocean Songs: Put Your Hand In The Hand |
| | Ocean Colour Scene Songs: The Riverboat Song · The Day We Caught The Train |
| | Ocean Drive Songs: Without You (Perdue sans toi) (feat. DJ Oriska) |
| Billy Ocean |
| Songs: Suddenly · When the Going Gets Tough, the Tough Get Going (The Jewel of the Nile) · Love Really Hurts Without You · Caribbean Queen (No More Love On The Run) · There'll Be Sad Songs (To Make You Cry) |
| Frank Ocean |
| Songs: Thinkin Bout You · Sweet Life · Super Rich Kids (feat. Earl Sweatshirt) |
| | Oceana Songs: Endless Summer · Cry Cry |
| | Tom Odell Songs: Another Love |
| | Odyssey Songs: Native New Yorker · Going Back To My Roots |
| Of Monsters And Men |
| Songs: Little Talks · King And Lionheart |
| | Offenbach Songs: Mes blues passent pu dans porte · Chu un rocker · Promenade sur Mars |
| | Kardinal Offishall Songs: Dangerous (feat. Akon) · Beautiful (with Akon & Colby O'Donis) |
| The Offspring |
| Songs: The Kids Aren't Alright (The Faculty) · Original Prankster · Pretty Fly (For a White Guy) · You're Gonna Go Far, Kid · Hit That |
| | Ofra Haza Songs: Im Nin'Alu |
| | Ohio Express Songs: Yummy Yummy Yummy |
| | The Ohio Players Songs: Love Rollercoaster · Fire |
| Oingo Boingo |
Danny Elfman
Songs: Stay · Not My Slave · Just Another Day · Grey Matter · No Spill Blood |
| Oklahoma |
| Songs: Oh What A Beautiful Morning · I Cain't Say No · Oklahoma · The Surrey With The Fringe On Top · Out Of My Dreams (Dream Ballet) |
| | Olaf Malolepski Songs: Tausend rote Rosen |
| Old Crow Medicine Show |
OCMS
Songs: Wagon Wheel |
| | Oldelaf Songs: La tristitude |
| | Mike Oldfield Songs: Moonlight Shadow (with Maggie Reilly) · Tubular Bells · To France (feat. Maggie Reilly) |
| | Oli P. Songs: So Bist Du (Und Wenn Du Gehst...) · I Wish · Flugzeuge Im Bauch · Das Erste Mal Tat's Noch Weh |
| | Olive Songs: You're Not Alone |
| Oliver! |
Musicals & Broadway
Songs: Food, Glorious Food · Consider Yourself · I'd Do Anything · Oom Pah Pah · As Long As He Needs Me |
| Olly Murs |
Oliver "Olly" Stanley Murs
Songs: Troublemaker (feat. Flo Rida) · Army Of Two · Dance With Me Tonight · This Song Is About You · Heart Skips A Beat (feat. Rizzle Kicks) |
| | Olsen Brothers Songs: Fly On The Wings Of Love (Winner Eurovision 2000) |
| Renee Olstead |
| Songs: Meet Me, Midnight · Hit The Road Jack · Someone To Watch Over Me (feat. Chris Botti) · Breaking Up Is Hard To Do (with Peter Cincotti) · Midnight Man |
| | Olympic Games Songs: I Believe (Nikki Yanofsky - Vancouver 2010) · Survival (Muse) · Spinnin' for 2012 · Anywhere In The World (Mark Ronson feat. Katy B) · J'imagine (Annie Villeneuve) |
| | The Olympics Songs: (Baby) Hully Gully · Western Movies |
| Don Omar |
| Songs: Taboo · Hasta que salga el sol · Danza kuduro · Zumba · Sudando |
| | Omarion Songs: O · Ice Box · Let Me Hold You (with Lil' Bow Wow) |
| | OMC Songs: How Bizarre |
| | Once Songs: Falling Slowly (Glen Hansard & Markéta Irglová) |
| One Direction |
| Songs: What Makes You Beautiful · One Way Or Another (Teenage Kicks) · Live While We're Young · Little Things · One Thing |
| | One Night Only Songs: Say You Don't Want It (feat. Emma Watson) · It's About Time · Just For Tonight |
| | One Tree Hill Songs: Halo (Bethany Joy Lenz) · I Don't Want To Be (Gavin DeGraw) · Be Yourself (Audioslave) · Everybody's Changing (Keane) · I Don't Care (Fall Out Boy) |
| | One True Voice Songs: Sacred Trust · Shakespeare's Way With Words |
| OneRepublic |
| Songs: Feel Again · Come Home · If I Lose Myself · Secrets · Apologize (Timbaland) |
| | Oomph! Songs: Augen Auf! |
| | Trijntje Oosterhuis Songs: Kleine Jongen (Live) · Knocked Out · Nu dat jij er bent · De zee · Face In The Crowd (with Lionel Richie) |
| | Opus Songs: Live Is Life (Live) |
| Rita Ora |
| Songs: Radioactive · R.I.P. (feat. Tinie Tempah) · Shine Ya Light · How We Do (Party) · Lay Down Your Weapons (with K Koke) |
| Roy Orbison |
See also: The Traveling Wilburys
Songs: Oh, Pretty Woman · Crying (duet) (with k.d. lang) · Crying · You Got It · Only The Lonely |
| | Orchestral Manoeuvres in the Dark Songs: Enola Gay |
| | La oreja de Van Gogh Songs: La niña que llora en tus fiestas · La playa · En mi lado del sofá · Rosas · Sin Miedo a Nada (with Álex Ubago) |
| | Orelsan Songs: La terre est ronde |
| | Organiz' Songs: I Never Knew Love Like This Before |
| | Orgy Songs: Opticon |
| | Orianthi Songs: According To You |
| | El Original Songs: Brujula de amor |
| | Orleans Songs: Still The One · Dance With Me |
| | Peter Orloff Songs: Ich Liebe Dich · Cora Komm Nach Haus · Königin Der Nacht · Königin Der Nacht 2002 · Ein Mädchen Für Immer |
| | Antonio Orozco Songs: Una y otra vez · Es mi soledad · La cuestión |
| | Stacie Orrico Songs: Stuck · (There's Gotta Be) More To Life · Instead · I'm Not Missing You |
| | Michel Orso Songs: Medley Gilbert Bécaud · Angélique |
| | Orson Songs: No Tomorrow · Happiness · Bright Idea |
| | Osborne Brothers Songs: Rocky Top |
| | Jeffrey Osborne Songs: On The Wings Of Love · Stay With Me Tonight · You Should Be Mine (The Woo Woo Song) · In Your Eyes · Far Longer Than Forever (in duet with Regina Belle, The Swan Princess) |
| Joan Osborne |
| Songs: One Of Us · Right Hand Man · Crazy Baby · Righteous Love · St. Teresa |
| | Kelly Osbourne Songs: Papa Don't Preach · One Word · Changes (feat. Ozzy Osbourne) |
| Ozzy Osbourne |
See also: Black Sabbath & Kelly Osbourne
Songs: Crazy Train · I Don't Know · Dreamer · Goodbye To Romance · No More Tears |
| | K.T. Oslin Songs: Do Ya · 80's Ladies · I'll Always Come Back · Hey Bobby · Come Next Monday |
| | Emily Osment Songs: Wherever I Go |
| Donny Osmond |
See also: The Osmonds, Marie Osmond & Jimmy Osmond
Songs: Puppy Love · Go Away Little Girl · A Little Bit Country, A Little Bit Rock 'N Roll (with Marie Osmond) · The Twelfth Of Never · I'm Leaving It (All) Up To You (with Marie Osmond) |
| | Jimmy Osmond Songs: Mother of Mine · Long Haired Lover From Liverpool |
| | Marie Osmond Songs: A Little Bit Country, A Little Bit Rock 'N Roll (with Donny Osmond) · Paper Roses · I'm Leaving It (All) Up To You (with Donny Osmond) |
| | The Osmonds Songs: One Bad Apple · Love Me For A Reason · Crazy Horses · Goin' Home · Let Me In |
| Otis Day And The Knights |
Musical film National Lampoon's Animal House
Songs: Shama Lama Ding Dong · Shout |
| Ottawan |
| Songs: D.I.S.C.O (English version) · Hands Up (Give Me Your Heart) · Megamix · D.I.S.C.O (version française) · T'es OK |
| | Otto Knows Songs: Million Voices |
| | James Otto Songs: Just Got Started Lovin' You · These Are The Good Old Days · Days Of Our Lives |
| | Ou Est Le Swimming Pool Songs: Dance The Way I Feel |
| | Our Lady Peace Songs: Where Are You · Somewhere Out There |
| | Outasight Songs: Tonight Is The Night |
| The Outfield |
| Songs: Your Love · Since You've Been Gone · All The Love · For You |
| | The Outhere Brothers Songs: Boom Boom Boom · If You Wanna Party (with Molella) |
| | OutKast Songs: Hey Ya! ((Radio Mix/Club Mix)) · Elevators (Me & You) · Land Of A Million Drums · Ms. Jackson · Mighty 'O' |
| | Outlandish Songs: Aïcha |
| | Outlaws Songs: Ghost Riders In The Sky · Green Grass And High Tides |
| | Outwork Songs: Elektro (Dance Remix) |
| | Gaston Ouvrard Songs: Je n'suis pas bien portant |
| The Overtones |
| Songs: Runaround Sue · Reet Petite · In The Still Of The Night · Blue Moon · Why Do Fools Fall In Love |
| Jake Owen |
| Songs: Barefoot Blue Jean Night · Alone With You · Eight Second Ride · Don't Think I Can't Love You · Yee Haw |
| | Mark Owen Songs: Four Minute Warning |
| | Randy Owen Songs: Braid My Hair |
| Buck Owens |
| Songs: Rollin' In My Sweet Baby's Arms · Together Again · Act Naturally · Pfft You Were Gone (Hee Haw Theme) · Keys In The Mailbox |
| | Ginny Owens Songs: With Me · I Am |
| Owl City |
Adam Young
Songs: Good Time (with Carly Rae Jepsen) · Fireflies · Shine Your Way (feat. Young & Yuna) · Vanilla Twilight · Umbrella Beach |
| | Anna Oxa Songs: Senza di me · Non Scendo |
| | Ozark Mountain Daredevils Songs: Jackie Blue · If You Wanna Get To Heaven |
| | John Ozila Songs: Medley tropical |
