Oath Rebbeca Gomez, Cher Lloyd, Becky G, Ammar Malik, Lukasz Gottwald, Dan Omelio Guitar, Piano Dance-pop, Folk, Pop, Pop Rock, Teen Pop
Obvious Benj Pasek, Travis Barker, Ariana Grande, Andreas Carlsson, Carl Falk, Travis Landon Barker Guitar, Piano, Clarinet, Tenor, Trumpet, Tenor Saxophone Broadway, Dance-pop, Stage & Screen, Folk, Rock
Off The Chain Devrim Karaoglu, Selena Gomez, Antonina Armato, Timothy Price, The Scene Guitar, Piano, Electric guitar Pop, Teen Pop, Folk
Oh Cecilia Amund Bjorklund, James McVey, Bradley Simpson, Tristan Evans, Keinan Abdi Warsame, Amund Bjoerklund Piano, Guitar, Electric guitar Pop Rock, Folk Rock, Pop, Folk, Alternative Pop/Rock
Oh Aaron Brian Kierulf, Andy Goldmark, Joshua Schwartz, Aaron Carter Piano, Guitar Hip Hop, Dance-pop, Teen Pop, Pop
No Strings Attached Bradley Daymond, Brad Daymond, Jc Chasez, Alex Greggs, 'N Sync Piano, Guitar Pop, Teen Pop
Oh No What You Got Timothy Mosley, Justin Timberlake, Timothy Z. Mosley Piano, Guitar Teen Pop, Dance-pop, Adult Contemporary, Pop
Old Blue Jeans Michael Bradford, Hannah Montana, Pam Sheyne, Miley Cyrus, Pamela Sheyne Piano, Electric guitar, Guitar Stage & Screen, Soundtrack, Folk, Pop, Pop Rock
Olivia John Henry Ryan, Greg Mallett, Julian Bunetta, Christian Blaha, Harry Styles, Julian C Bunetta Guitar, Piano Folk, Pop, Teen Pop
One Day At A Time Joseph Jonas, Jonas Brothers, Daniel O'Donnell, Jeremy Camp, Kevin Jonas II, Nancy Barry Piano, Guitar, Ukulele, Electric guitar Country, Blues, Easy Listening, Contemporary Christian, Stage & Screen
One Direction One Direction, Carl Falk, Rami Yacoub, Savan Kotecha, Albin Nedler, Kristoffer Fogelmark Violin, Piano Pop Rock, Pop, Teen Pop, Stage & Screen, Dance-pop
One Less Lonely Girl Balewa Muhammad, Bale'wa Muhammed, Ezekiel Lewis, Hyuk Shin, Justin Bieber, Sean Hamilton Piano, Guitar, Ukulele Teen Pop, Dance-pop, Rhythm & Blues, Pop, Contemporary R&B
One Of The Boys Dolly Parton, John Kander, Fred Ebb, Katy Perry Piano, Guitar Pop, Stage & Screen, Broadway, Rock, Folk
One Man Show Joseph Jonas, Nicholas Jonas, Kevin Jonas II, Jonas Brothers, Joe Jonas, Nick Jonas Guitar, Piano, Electric guitar Pop, Teen Pop, Pop Rock
One Thing One Direction, Savan Cotecha, Daryl McKenzie, Dylan Thomas, Alicia Keys, Rami Yacoub Piano, Bass, Double Bass, Electric guitar, Electronic keyboard, Trumpet Pop, alternative, Rock, Pop Rock, Contemporary Christian
One Time James Bunton, Corron Cole, Corron Ty Kee Cole, Christopher Tricky Stewart, Justin Bieber, Tricky Stewart Guitar, Piano, Electric guitar, Ukulele Pop Rock, Contemporary R&B, Folk, Rock, Dance-pop
One Shot Kenneth Karlin, Carl Raven, Alan Silvestri, Michael Warren, Sam Fettig, Sean Hurley Viola, Saxophone, Piano, Alto Saxophone, Guitar Folk, Pop, Pop Rock, Easy Listening, Teen Pop
One Step At A Time Mich Hansen, Allison Taylor, Robert Nevil, American Idol, Jordin Sparks, Jonas Jeberg Piano, Guitar, Electric guitar Pop, Dance-pop, Pop Rock, Teen Pop, Folk
