| | O Brother, Where Art Thou? Songs: I Am A Man Of Constant Sorrow (Soggy Bottom Boys) |
| | Des O'Connor Songs: I Pretend · 1-2-3 O'Leary · Careless Hands · 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: Just Dance (with Lady GaGa) · Beautiful (with Akon & Kardinal Offishall) · What You Got (feat. Akon) |
 | Daniel O'Donnell |
| Songs: Danny Boy · Crush On You · Isle Of Innisfree · The Wedding Song |
| | Erin O'Donnell Songs: No Place So Far |
| The O'Jays |
| Songs: Love Train · For The Love Of Money · Use Ta Be My Girl · 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: Like A Woman · Soldier Comin' Home · God Don't Make Mistakes · Sanctuary · There Is No Arizona |
| | Gilbert O'Sullivan Songs: Alone Again (Naturally) · Nothing Rhymed · Matrimony · Clair · Get Down |
| | O-Town Songs: All Or Nothing · We Fit Together · Liquid Dreams · These Are The Days · Baby I Would |
| The Oak Ridge Boys |
| Songs: Elvira · Trying To Love Women · American Made · Come On In · Sail Away |
| | Paul Oakenfold Songs: Rubberneckin' Remix (with Elvis Presley) |
| Oasis |
Noel Gallagher & Liam Gallagher
See also: Beady Eye
Songs: Don't Look Back In Anger · Champagne Supernova · Wonderwall · Live Forever · Some Might Say |
| | Agnes Obel Songs: Riverside |
| | Stefan Oberhoff Songs: Merci, Daß Es Dich Gibt |
| Pascal Obispo |
See also: Captain Samouraï Flower & Ensemble
Songs: Rosa · Le chanteur idéal · Ce qu'on voit, allée Rimbaud · Si je manquais de ta peau · Sa raison d'être (Live Fan) |
| | OBK Songs: Sin rencor |
| | Ocean Songs: Put Your Hand In The Hand |
| Ocean Colour Scene |
| Songs: The Day We Caught The Train · The Riverboat Song |
| | Ocean Drive Songs: Without You (Perdue sans toi) (feat. DJ Oriska) |
| Billy Ocean |
| Songs: Love Really Hurts Without You · Suddenly · When the Going Gets Tough, the Tough Get Going (The Jewel of the Nile) · Red Light Spells Danger · Caribbean Queen (No More Love On The Run) |
| | Frank Ocean Songs: Sweet Life · Thinkin Bout You · Super Rich Kids (feat. Earl Sweatshirt) |
| | Oceana Songs: Cry Cry · Endless Summer |
| | Tom Odell Songs: Another Love |
| | Odyssey Songs: Going Back To My Roots · Native New Yorker |
| 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: Beautiful (with Akon & Colby O'Donis) · Dangerous (feat. Akon) |
| | The Offspring Songs: Pretty Fly (For a White Guy) · Hit That · (Can't Get My) Head Around You · Original Prankster · Can't Repeat |
| | Ofra Haza Songs: Im Nin'Alu |
| | Ohio Express Songs: Yummy Yummy Yummy |
| | The Ohio Players Songs: Love Rollercoaster · Fire |
| | Oingo Boingo Songs: Stay · Just Another Day · Not My Slave · No One Lives Forever · On The Outside |
| Oklahoma |
| Songs: Oh What A Beautiful Morning · People Will Say We're In Love · Many A New Day · Oklahoma · I Cain't Say No |
| | 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) · To France (feat. Maggie Reilly) · Tubular Bells |
| | Oli P. Songs: I Wish · So Bist Du (Und Wenn Du Gehst...) · Das Erste Mal Tat's Noch Weh · Flugzeuge Im Bauch |
| Oliver! |
Musicals & Broadway
Songs: Food, Glorious Food · Consider Yourself · Oom Pah Pah · You've Got To Pick A Pocket Or Two · Reviewing The Situation |
| | Franck Olivier Songs: Quand on est seul |
| Olly Murs |
Oliver "Olly" Stanley Murs
Songs: Troublemaker (feat. Flo Rida) · Army Of Two · Dance With Me Tonight · Thinking Of Me · Busy |
| | Olsen Brothers Songs: Fly On The Wings Of Love (Winner Eurovision 2000) |
| Renee Olstead |
| Songs: Taking A Chance On Love · Summertime · Breaking Up Is Hard To Do (with Peter Cincotti) · A Love That Will Last · Is You Is Or Is You Ain't My Baby |
| | Olympic Games Songs: Spinnin' for 2012 · Anywhere In The World (Mark Ronson feat. Katy B) · Summon The Heroes (John Williams) · Survival (Muse) · I Believe (Nikki Yanofsky - Vancouver 2010) |
| | The Olympics Songs: (Baby) Hully Gully · Western Movies |
| Don Omar |
| Songs: Danza kuduro · Hasta que salga el sol · Zumba · Taboo · Salió El Sol |
| | 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: One Way Or Another (Teenage Kicks) · What Makes You Beautiful · Little Things · Live While We're Young · Up All Night |
| | One Night Only Songs: Say You Don't Want It (feat. Emma Watson) · Just For Tonight · It's About Time |
| | One Tree Hill Songs: Don't Wait (Dashboard Confessional) · Everybody's Changing (Keane) · I Don't Want To Be (Gavin DeGraw) · Be Yourself (Audioslave) · Naive (The Kooks) |
| | One True Voice Songs: Sacred Trust · Shakespeare's Way With Words |
| OneRepublic |
| Songs: Stop & Stare · If I Lose Myself · Secrets · All The Right Moves · Feel Again |
| | Yoko Ono Songs: Happy Xmas (War Is Over) (with John Lennon) |
| | Trijntje Oosterhuis Songs: Knocked Out · Kleine Jongen (Live) · Face In The Crowd (with Lionel Richie) · Nu dat jij er bent · De zee |
| | Opus Songs: Live Is Life (Live) |
| Rita Ora |
| Songs: How We Do (Party) · R.I.P. (feat. Tinie Tempah) · Radioactive · Shine Ya Light · Lay Down Your Weapons (with K Koke) |
| Roy Orbison |
See also: The Traveling Wilburys
Songs: Oh, Pretty Woman · You Got It · Penny Arcade · California Blue · I Drove All Night |
| | Orchestral Manoeuvres in the Dark Songs: Enola Gay |
| | The Ordinary Boys Songs: I Luv U |
| | La oreja de Van Gogh Songs: La niña que llora en tus fiestas · Rosas · Sin Miedo a Nada (with Álex Ubago) · 20 de Enero · La playa |
| | Orelsan Songs: La terre est ronde |
| | Organiz' Songs: I Never Knew Love Like This Before |
| | Orgy Songs: Opticon |
| | Orianthi Songs: According To You |
| | Orleans Songs: Dance With Me · Still The One |
| | Peter Orloff Songs: Königin Der Nacht · Cora Komm Nach Haus · Ich Liebe Dich · Ein Mädchen Für Immer · Königin Der Nacht 2002 |
| | Antonio Orozco Songs: Es mi soledad · La cuestión · Una y otra vez |
| | Stacie Orrico Songs: Instead · I'm Not Missing You · (There's Gotta Be) More To Life · Stuck |
| | Michel Orso Songs: Medley Gilbert Bécaud · Angélique |
| | Orson Songs: No Tomorrow · Bright Idea · Happiness |
| | Osborne Brothers Songs: Rocky Top |
| Jeffrey Osborne |
| Songs: Stay With Me Tonight · Far Longer Than Forever (in duet with Regina Belle, The Swan Princess) · On The Wings Of Love · You Should Be Mine (The Woo Woo Song) · In Your Eyes |
| Joan Osborne |
| Songs: One Of Us · St. Teresa · Righteous Love · Crazy Baby · Right Hand Man |
| | Kelly Osbourne Songs: Papa Don't Preach · One Word · Changes (feat. Ozzy Osbourne) |
| | Ozzy Osbourne Songs: Crazy Train · Gets Me Through · Time After Time · Mississippi Queen · Shot In The Dark |
| | K.T. Oslin Songs: Miss The Mississippi And You · I'll Always Come Back · 80's Ladies · Hey Bobby · Come Next Monday |
| | Emily Osment Songs: Wherever I Go |
| Donny Osmond |
See also: The Osmonds, Marie Osmond & Jimmy Osmond
Songs: A Little Bit Country, A Little Bit Rock 'N Roll (with Marie Osmond) · Puppy Love · Sweet And Innocent · What I Meant To Say · Soldier of Love |
| | Jimmy Osmond Songs: Mother of Mine · Long Haired Lover From Liverpool |
| | Marie Osmond Songs: Paper Roses · A Little Bit Country, A Little Bit Rock 'N Roll (with Donny Osmond) · I'm Leaving It (All) Up To You (with Donny Osmond) |
| | The Osmonds Songs: Love Me For A Reason · Let Me In · Crazy Horses · One Bad Apple · Goin' Home |
| | Otis Day And The Knights Songs: Shout · Shama Lama Ding Dong |
| Ottawan |
| Songs: Hands Up (Give Me Your Heart) · D.I.S.C.O (English version) · D.I.S.C.O (version française) · Megamix · Haut les mains (Donne moi ton coeur) |
| | Otto Knows Songs: Million Voices |
| | James Otto Songs: These Are The Good Old Days · Just Got Started Lovin' You · 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) · Wat Da Hook Gon Be (with Murphy Lee) · Ms. Jackson · Mighty 'O' |
| | Outlandish Songs: Aïcha |
| | Outlaws Songs: Ghost Riders In The Sky · Green Grass And High Tides |
| | Outspoken Songs: Farther |
| | Outwork Songs: Elektro (Dance Remix) |
| | Gaston Ouvrard Songs: Je n'suis pas bien portant |
| The Overtones |
| Songs: Gambling Man · Reet Petite · Sh Boom (Life Could Be A Dream) · In The Still Of The Night · Runaround Sue |
| | Jake Owen Songs: Barefoot Blue Jean Night · Yee Haw · Startin' With Me · Eight Second Ride · Alone With You |
| Buck Owens |
| Songs: Together Again · Rollin' In My Sweet Baby's Arms · Act Naturally · Keys In The Mailbox · Under Your Spell Again |
| | Ginny Owens Songs: I Am · With Me |
| 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: Non Scendo · Senza di me |
| | Ozark Mountain Daredevils Songs: If You Wanna Get To Heaven · Jackie Blue |
| | John Ozila Songs: Medley tropical |
