| - O (Omarion) | - One Thing Remains (Default) |
| - O (Damien Rice) | - One Voice (Billy Gilman) |
| - O-Town (O-town) | - One Voice (Barry Manilow) |
| - Obscured By Clouds (Pink Floyd) | - One Wish: The Holiday Album (Whitney Houston) |
| - Ocean Avenue (Yellowcard) | - One-X (Three Days Grace) |
| - Oceanborn (Nightwish) | - Ones (Mariah Carey) |
| - Oceans of Fantasy (Boney M) | - Only By The Night (Kings Of Leon) |
| - Octahedron (The Mars Volta) | - Only God Can Judge Me (Master P) |
| - Octave (Moody Blues) | - Only In Amerika (hed P.e.) |
| - October (U2) | - Only In Amerika ((Hed) P.e.) |
| - Odelay (Beck) | - Only Love (Trademark) |
| - Of A Simple Man (Lobo) | - Only Through The Pain (Trapt) |
| - Off The Hook (Xscape) | - Only When I Lose Myself (Depeche Mode) |
| - Off The Wall (Michael Jackson) | - Ooooooohhh... On The TLC Tip (TLC) |
| - Offspring (Offspring) | - Ooooooohhh...On the Tlc Tip (Tlc) |
| - Oh! Gravity. (Switchfoot) | - Oops I Did It Again (Britney Spears) |
| - Ok Computer (Radiohead) | - Oops! ...I Did It Again (Britney Spears) |
| - Ok Now (Jon Mclaughlin) | - Open Up and Say...Ahh! (Poison) |
| - Old Friends From Young Years (Papa Roach) | - Operation: Mindcrime (Queensryche) |
| - Old Ways (Neil Young) | - Ophelia (Natalie Merchant) |
| - Older (George Michael) | - Opheliac (Emilie Autumn) |
| - On A Clear Day You Can See Forever (Barbra Streisand) | - Opiate (Tool) |
| - On A Day Like Today (Bryan Adams) | - Oracle (Kittie) |
| - On and On (Jack Johnson) | - Oral Fixation Vol. 2 (Shakira) |
| - On Earth As It Is In Hell (Masacre) | - Oral Fixation Vol.2 (Shakira) |
| - On Every Street (Dire Straits) | - Orama (On Thorns I Lay) |
| - On The 6 (Jennifer Lopez) | - Orchestral Favorites (Frank Zappa) |
| - On The Border (Eagles) | - Ordinary Dreamers (Group 1 Crew) |
| - On The Border (The Eagles) | - Organix (The Roots) |
| - On The Cover (Mxpx) | - Origin (Evanescence) |
| - On The Front Line (The Casualties) | - Origin Of Symmetry (Muse) |
| - On The Way To The Sky (Neil Diamond) | - Original Pirate Material (The Streets) |
| - Once (Nightwish) | - Orphans: Brawlers, Bawlers & Bastards (Tom Waits) |
| - Once Again (John Legend) | - Otro Dia Mas Sin Verte (Jon Secada) |
| - Once Sent From The Golden Hall (Amon Amarth) | - Our Endless Numbered Days (Iron & Wine) |
| - One By One (Foo Fighters) | - Our Endless Numbered Days (Iron and Wine) |
| - One Day Remains (Alter Bridge) | - Our Love To Admire (Interpol) |
| - One Fell Swoop (The Spill Canvas) | - Out Of Darkness (Bloodgood) |
| - One For The Kids (Yellowcard) | - Out Of Exile (Audioslave) |
| - One Heart (Celine Dion) | - Out Of Range (Ani Difranco) |
| - One Hot Minute (Red Hot Chili Peppers) | - Out Of Step (Minor Threat) |
| - One In A Million (Bosson) | - Out Of The Blue (Elo) |
| - One In A Million (Aaliyah) | - Out Of The Moment (Dawn Of Dreams) |
| - One Love (New Edition) | - Out Of The Vein (Third Eye Blind) |
| - One Love (Blue) | - Outland's Official (Outlandish) |
| - One Nation Underground (Ill Nino) | - Outlandos D'Amour (The Police) |
| - One Of The Boys (Katy Perry) | - Outrospective (Faithless) |
| - One Of These Nights (Eagles) | - Over the Hills and Far Away (Nightwish) |
| - One Particular Harbour (Jimmy Buffett) | - Over-Nite Sensation (Frank Zappa) |
| - One Step Closer (Linkin Park) | - Ozzmosis (Ozzy Osbourne) |
