Old Time Rock and Roll  by Bob Seger

Our Winter Love  by Alan Freed, Harvey Fuqua, as performed by Bill Purcell

Oblivion  by Unknown

One  by Pete Belasco

One Minute  by Judie Tzuke, Brandon Frownes

Oh, Dem Golden Slippers  by James A. Bland, as performed by Fats Waller

Opening Song, from Great Balls of Fire (from 00:13 to 01:17)  by Jerry Lee Lewis, as performed by Jerry Lee Rock

O Praise The Name  by Marty Sampson, Ben Hastings and Dean Ussher, as performed by Geoffrey Andrews

Organ Sonata No. 4, BWV 528: II. Andante [Adagio] (from 04:05 to 05:05)  by J.S. Bach, as performed by Víkingur Ólafsson

Open My Eyes, from Pokémon the Movie: Diancie and the Cocoon of Destruction (from 03:20 to 04:51)  by Ed Goldfarb

One Less Bell to Answer  by Burt Bacharach, as performed by Charles Manning

Oh Industry  by Bette Midler, Wendy Waldman

Outro Playing (from 17:36 to 20:40)  by Jack Duxbury

Old Churchyard  by Trad., as performed by The Wailin' Jennys

One Last Time  by Dream Theater

Orphée's Bedroom  by Philip Glass, as performed by Sergio Sorrentino

Only For You (from 00:26 to 01:12)  by Heartless Bastards

Off Broadway  by Antonio Garza

Only A Dream  by Mary Chapin Carpenter

Oh The Deep, Deep Love of Jesus  by Samuel Trevor Francis, as performed by Audrey Assad

Over & Over  by Smallpools

On Your Birthday (당신 생일날에)  by Jong Hwan Kim

Oj, Jelenchice (from 01:04 to 01:20)  by Trad., as performed by Pece Atanasovski

One In A Million You  by Larry Graham

Over the Rainbow  by Harold Arlen, as performed by Beegie Adair

Own This World  by Ethan Lewis Maltby, as performed by Emily Carey

Oh Daddy  by Adrian Belew

Octopus Joy  by Kevin Smuts

Options, from Sonic Advance 2 (from 00:00 to 01:02)  by Tatsuyuki Maeda, Yutaka Minobe

Only Trying To Help  by Dan Povenmire, Martin Olson, Robert F. Hughes, Jeff "Swampy" Marsh, as performed by Ashley Tisdale, Alyson Stoner