Opening Fanfare Adam Kosberg, Stefano Fabrizio Sacchi, Richard Rodgers Violino, Flauta doce, Flauta, Piano, Oboé Palco & Tela, Musical
Opening Up Mac Huff, Sara Bareilles Piano, Guitarra, Guitarra elétrica Musical, Pop, Rock, Folclore, Palco & Tela
Once We Were Kings Lee Hall, Chris Lawry, Elton John Guitarra, Piano Musical, Folclore, Musical ou Espetáculo, Broadway, Palco & Tela
One Day I'll Fly Away Spence Bundy, Randy Crawford, Richard John, Joe Sample, Nicole Kidman, Will Jennings Guitarra, Piano, Flauta, Soprano, Saxofone Alto, Saxofone Tenor Palco & Tela, Balada, Smooth Jazz, Musical ou Espetáculo, Broadway
On The Inside Lynne Hamilton, DAVID M COMBS, Paul Brandt, Allan Caswell, Brett Jones, Gary Prim Guitarra, Piano Musical, Folclore, Palco & Tela, Pop, Nova Era
Opening Emmanuel González, Hiroyuki Yanada, Craig Armstrong, Richard Strauss, Bong Joon Ho, Carter Burwell Piano, Oboé, Harpa, Contrabaixo, Baixo, Flauta Clássica, Palco & Tela, Musical
Oompa Loompa Doompadee-Doo - from Wonka Leslie Bricusse, Anthony Newley, Lisa Ochoco, Erica Avery Piano, Barítono, Viola, Tenor, Saxofone Baixo, Saxofone Tenor Palco & Tela, Trilha sonora, Infantil, Broadway, Musical
Opening Night Mac Huff, Mel Brooks, Kevin Costley Piano, Guitarra, Saxofone Tenor, Clarinete, Flauta, Tenor Infantil, Folclore, Trilha sonora, Palco & Tela, Pop
Open The Door Richard! Dan Howell, Louis Jordan, Dusty Fletcher, John Mason, Count Basie Guitarra, Piano Musical, Jazz, Big Band, Blues Urbano, Jump Blues
On The Sunny Side Of The Street Diego Monteiro, Frankie Laine, Dorothy Fields, Frank Sinatra, Dizzy Gillespie, Nat King Cole Piano, Guitarra, Órgão, Teclado eletrônico, Trombone, Trompete Country, Pop, Clássica, Folclore, Jazz
Opus #17 Dustin O'Halloran, Frankie Valli, Denny Randell, Sandy Linzer, John Trie, The Four Seasons Piano, Guitarra Palco & Tela, Pop Rock, Trilha sonora, Folclore, Nova Era
Orphan Girl / Travelin' Man Chris Miller Piano, Guitarra Rock, Teatro, Musical, Pop Tradicional, Palco & Tela
Oscail an Doras Bill Whelan, John Ivor Holland Piano Folclore Mundo e País, Palco & Tela, Folclore, Musical, Broadway
One Track Mind Eric Clapton, Craig Carnelia, The Knickerbockers, Marvin Hamlisch, Keith Colley, Kevin Colley Piano, Guitarra, Guitarra elétrica Blues Rock, Jazz, Palco & Tela, Boogie Woogie, Pop
Optimistic Voices Harold Arlen, Herbert Stothart Ukulele, Guitarra, Piano Musical, Palco & Tela, Musical ou Espetáculo, Trilha sonora
Our Children Charles Strouse, Marin Mazzie, Stephen Flaherty, Lynn Ahrens, Paul Cardall Piano, Guitarra Gospel, Broadway, Musical, Palco & Tela
