On The Line Nick Jonas, Joseph Jonas, Kevin Jonas II, Christopher Norton, Demi Lovato, Nicholas Jonas Guitarra, Piano, Guitarra elétrica Folclore, Clássica, Dance-pop, Teen Pop, Pop Rock
Ooh Ooh Baby Kara DioGuardi, Eric Coomes, Britney Spears, Fred Nassar Piano, Guitarra, Guitarra elétrica Pop Rock, Pop, Dança, Dance-pop, Folclore
Ooh Jason Sellards, Derek Gruen, Jamison Mechalie, Mary J, Scissor Sisters, Sean Combs Guitarra, Piano, Guitarra elétrica Pop, Pop Rock, Folclore, Dance-pop, Hip Hop
Open Your Heart Andreas Carlsson, Georges Bizet, Daniel Brewbaker, Gardner Cole, Jill Johnson, Dean Pitchford Violino, Piano, Violoncelo, Viola, Guitarra elétrica, Guitarra Easy Listening, Folclore, Ópera, Broadway, Pop Rock
Opposites Attract George Hutchinson, Billie Myers, Oliver Leiber, Paula Abdul Piano, Guitarra, Guitarra elétrica Dance-pop, Rhythm & Blues, Clube/Dança, Folclore, Pop
One Kiss Dove Cameron, Calvin Harris, Adam Wiles, Jessica Reyes, Nathaniel Shilkret, Jessie Reyez Ukulele, Piano, Guitarra, Voz média, Guitarra elétrica, Vocal Solo Dança, Casa, Dance-pop, Clássica, Eletrônico
One Man One Woman Benny Andersson, Bjorn Ulvaeus Piano, Guitarra Europop, Dance-pop, Pop Rock, Disco, Folclore
Only Want You Louis Bell, Andrew Wotman, Ali Tamposi, Emily Warren, Rita Ora Guitarra, Piano Folclore, Pop, Dance-pop
Original Of The Species Guitarra, Piano, Guitarra elétrica Pop, Rock, Pop/Rock Alternativo, Alternativa Adulta, Dance-pop
Origin Of Love Nicholas Littlemore, Mika, Paul Steele Guitarra, Piano Dance-pop, Pop, Dança, Pop Rock, Folclore
Orange Trees Erik Persson Hassle, Jakob Jerlström, Oscar Goerres, Marina Diamandis, Erik Hassle Guitarra, Piano Folclore, Dance-pop, Eletrônico, Pop
Ordinary World Billie Joe Armstrong, Simon Le Bon, John Taylor, Duran Duran, Green Day, Simon LeBon Piano, Guitarra, Guitarra elétrica Folclore, Pop Rock, punk, Dance-pop, Synth-pop
Out Of My League Noelle Scaggs, John Meredith Wicks, James King, Michael Fitzpatrick, fitz, John Wicks Piano, Guitarra Folclore, Pop/Rock Alternativo, Pop Rock, Indie Pop, Dance-pop
Original Sin Andrew Charles Farriss, Elton John, Andrew Farriss, Michael Hutchence, Bill Bruford, Michael Kelland John Hutchence Saxofone Soprano, Piano, Guitarra, Contrabaixo, Guitarra elétrica Álbuns de Rock, Clube/Dança, Rock, Jazz, Pop
Outside Adam Wiles, Dave Grohl, Ellie Goulding, Calvin Harris, Nate Mendel, Aaron Lewis Piano, Guitarra, Violino, Oboé, Flauta, Violoncelo Folclore, Pop, Rock, Clube/Dança, Rhythm & Blues
Overboard Justin Bieber, Dapo Torimiro, Oladapo Torimiro, Ingrid Michaelson, Taurian Shropshire, Waynne Nugent Piano, Guitarra Alternativa, Teen Pop, Dance-pop, Folclore, Pop Rock
Overload Cameron McVey, Felix Howard, Keisha Buchanan, John Legend, Paul Simm, Siobhan Donaghy Guitarra, Guitarra elétrica, Piano Folclore, Dance-pop, Pop, Pop Rock, Rhythm & Blues
Overrated Golden Brown, Gavin DeGraw, Gavin Brown, Jodi Marr, Three Days Grace, Page Nye Hamilton Guitarra, Piano Pop, Rock, Folclore, Dance-pop, Alt-Metal
August 31 - Out of the Woods Robert Moody, Jack Antonoff, Alan Billingsley, Jack Michael Antonoff, Nickel Creek, Taylor Swift Piano, Guitarra, Guitarra elétrica, Ukulele, Refrão, Trompete Country Pop, Palco & Tela, Nova Era, Pop Rock, Teen Pop
Out Of Town Girl Liam Horne, Graham Edwards, Lamar Stovall, Justin Bieber, Kenneth Coby Guitarra, Piano Dance-pop, Pop, Folclore, Pop Rock, Teen Pop
