On Hold Oliver Sim, James Smith, Sara Allen, Daryl Hall, The XX, Romy Croft Guitar, Piano, Electric guitar Electronic, Folk, Indie Electronic, Indie Pop, Pop
On My Mind Brian Culbertson, Ellie Goulding, Steve Finckle, Ian Grushka, Kiris Houston, Jordan Pundik Electric guitar, Guitar, Piano Blues, Folk, Jazz, Dance, Pop
Only You Becky Hill, Ellie Goulding, Derrick Stewart, Graham Edwards, Andrew Lloyd Webber, Ande Rand Guitar, Piano, Ukulele, Cornet, Baritone Sax, Flugelhorn Pop Rock, Synth-pop, Adult Contemporary, Country, Contemporary Christian
On My Way Leroy Clampitt, Brian Crawley, Fredrik Borch Olsen, Clarence Coffee Jr., Carlos Rosado, Carlos Efrén Reyes Rosado Piano, Guitar, Ukulele, Tenor, Baritone, Viola Blues, Children, Hip Hop, Stage & Screen, Club/Dance
On The Wing Carol Barratt, Adam Young, David Preston Amidei, Nolan Verner, Jake Shimabukuro, French Canadian Folk Song Tenor Saxophone, Piano, Ukulele, Guitar, Trumpet, Cello Concert Band, Alternative Pop/Rock, Children, Emo, Pop
On What You're On Busted, John Fields, Charlie Simpson, Lauren Christy, Matt Willis, James Bourne Piano, Guitar Electronic, Pop, Disc, Folk, Dance-pop
OK Dennis Bierbrodt, Ammar Malik, Maureen McDonald, Juergen Dohr, Guido Kramer, James Blount Guitar, Piano, Electric guitar Dance, Dance-pop, Electronic, Club/Dance, Pop
Optimistic Philip Selway, Jonathan Greenwood, Philip Seiway, Thom Yorke, Ed O'Brien, Edward O'Brien Guitar, Electric guitar Rock, Folk, Pop, Brit-Pop, Electronic
Opportunities Jeff Tincher, Chris Lowe, Pet Shop Boys, Neil Tennant Piano, Guitar, Trumpet, Tuba, Trombone Dance, Electronic, Pop, Folk
Orange Trees Erik Persson Hassle, Jakob Jerlström, Oscar Goerres, Marina Diamandis, Erik Hassle Piano, Guitar Folk, Dance-pop, Pop, Electronic
One Kiss Dove Cameron, Calvin Harris, Adam Wiles, Jessica Reyes, Nathaniel Shilkret, Jessie Reyez Piano, Guitar, Ukulele, Medium voice, Electric guitar Pop, Blues, Classical, Club/Dance, Folk
Outside Adam Wiles, Dave Grohl, Ellie Goulding, Calvin Harris, Nate Mendel, Aaron Lewis Oboe, Cello, Piano, Flute, Violin, Guitar Funk, Club/Dance, Synth-pop, Dance-pop, Rock
Out Of Reach Dream Theater, John Petrucci, Jonathan Shorten, Elizabeth Ragsdale, Michael Mangini, Gabrielle Guitar, Piano, Flute, Electric guitar, Clarinet, Violin Stage & Screen, Pop Rock, Folk, Pop, Dance-pop
Packt Like Sardines in a Crushd Tin Box Ed O'Brien, Colin Greenwood, Phil Selway, Edward O'Brien, Philip Selway, Thom Yorke Piano, Guitar alternative, Brit-Pop, Experimental, Alternative Pop/Rock, Electronic
On Your Side Abigail Morris, Georgia Davies, Emily Roberts, Lizzie Mayland, Jessica Origliasso, Aurora Nishevci Guitar, Piano Synth-pop, alternative, Folk, Ballad, Electronic
Papercut Charles Bennington, Anton Zaslavski, Jason Evigan, Brad Delson, André Laitano, Linkin Park Piano, Guitar, Bass, Double Bass, Drums Dance-pop, Folk, Pop Rock, Hip Hop, Dance
Paradise Circus Hope Sandoval, Grantley Marshall, Massive Attack, Ivy Jo Hunter, Rune Westerg, Daniel Brown Piano, Guitar Alternative Dance, Trip Hop, Rock, Pop Rock, alternative
Panic Room Jamie Stenzel, Andrew Frampton, Gabriel Benjamin Budin-Smithers, Max Farrar Guitar, Piano Electro, Folk, Electronic, Pop, Electropop
