thumb|right|Spears interpretando "Me Against the Music", canção contida em seu álbum In the Zone durante a turnê The Onyx Hotel Tour. Esta é uma lista das canções interpretadas, escritas e produzidas pela artista musical estadunidense Britney Spears. Muitas das canções de Spears foram registras por diversos organismos arquivistas oficiais, como a United States Copryight Office, Broadcast Music Incorporated (BMI) e American Society of Composers, Authors and Publishers (ASCAP). Diversas destas músicas estavam planejadas para entrar em alguns discos da cantora, nomeadamente Blackout e Circus, tais como "911", "Abroad" e "Telephone", com esta última sido gravada por Lady Gaga.
Desde 1999, ano em que Britney lançou seu primeiro projeto de estúdio Baby One More Time, a cantora conta com oito discos de estúdio, que somados com as faixas bônus e com canções contidas em compilações, contam com cento e cinquenta faixas ao todo. Algumas destas canções tiveram a participação especial de Spears, como "Scream & Shout", outras foram lançadas promocionalmente e/ou em virtude de beneficência, como "What's Going On?" e "Ooh La La". Em outros casos, as canções chegaram a ser gravadas e registradas pela gravadora, mas que não chegaram a ser incluídas em nenhum disco de Spears, nomeadamente a versão original de "And Then We Kiss" (que seria incluída no extended play (EP) Chaotic e "(Tell Me) What You're Sippin' On" — ou comumente referida de "Sippin' On" —, que seria incluída no DVD do álbum In the Zone e no disco Blackout; contudo, a versão original da música foi registrada pela gravadora e vazou ilegalmente na internet, mas foi rejeitada em ambos os projetos.
Era "...Baby One More Time"
CD ...Baby One More Time ...Baby One More Time (You Drive Me) Crazy Sometimes Soda Pop Born To Make You Happy From The Bottom Of My Broken Heart I Will Be There I Will Still Love You (Feat. Don Filip) Deep In My Heart Thinkin' About You E-Mail My Heart The Beat Goes On
B-Sides & Bonus Tracks … Baby One More Time (Davidson Ospina Radio Mix) … Baby One More Time (Boy Wunder Radio Mix) (You Drive Me) Crazy (The Stop Remix!) Autumn Goodbye I'll Never Stop Loving You I'm So Curious
Singles 1. ...Baby One More Time 2. Sometimes 3. (You Drive Me) Crazy (The Stop Remix!) 4. Born To Make You Happy 5. From The Bottom Of My Broken Heart
Canções não Lançadas Luv The Hurt Away (Feat. Full Force)
Era "Oops!... I Did It Again"
CD Oops!... I Did It Again Oops!... I Did It Again Stronger Don't Go Knockin on My Door (I Can't Get No) Satisfaction Don't Let Me Be The Last To Know What U See (Is What U Get) Lucky One Kiss From You Where Are You Now Can't Make You Love Me When Your Eyes Say It Dear Diary
B-Sides & Bonus Tracks Girl In The Mirror You Got It All Heart Walk On By
Singles 1. Oops!... I Did It Again 2. Stronger 3. Lucky 4. Don't Let Me Be The Last To Know
Canções não Lançadas 1. Asking For Trouble
Era "Britney"
CD Britney I'm a Slave 4 U Overprotected Lonely I'm Not a Girl, Not Yet a Woman Boys Anticipating I Love Rock 'n' Roll Cinderella Let Me Be Bombastic Love That's Where You Take Me What It's Like to Be Me (feat. Justin Timberlake)
B-Sides & Bonus Tracks Before the Goodbye Boys (The Co-Ed Remix) (Feat. Pharrell Williams) I'm Not a Girl, Not Yet a Woman (Metro Mix) I'm a Slave 4 U (Thunderpuss Radio Remix) Intimidated I Run Away Overprotected (The DarkChild Remix) When I Found You
Singles 1. I'm a Slave 4 U 2. Overprotected 3. I'm Not a Girl, Not Yet a Woman 4. Overprotected (The Darkchild Remix) 5. I Love Rock'n'Roll 6. Boys (The Co-Ed Remix) (feat. Pharrell Williams)
Singles Promocionais 1. Anticipating 2. That's Where You Take Me
Canções não Lançadas 1. Baby Can't You See 2. Bring Me Home 3. Can Caper 4. It's a Small World 5. She'll Never Be Me 6. Mystic Man (Dream Within a Dream Tour) 7. Weakness (Dream Within a Dream Tour) 8. You Were My Home (Dream Within a Dream Tour) 9. My Love Was Always There (Dream Within a Dream Tour) 10. Turn on the Night 11. When I Say So
Era "In The Zone"
CD In The Zone Me Against The Music (Feat. Madonna) (I Got That) Boom Boom (Feat. Ying Yang Twins) Showdown Breathe on Me Early Mornin' Toxic Outrageous Touch of My Hand The Hook Up Shadow Brave New Girl Everytime
B-Sides & Bonus Tracks The Answer Don't Hang Up Girls And Boys Me Against The Music (Rishi Rich's Desi Remix) (Feat. Madonna)
Singles 1. Me Against The Music (Feat. Madonna) 2. Toxic 3. Everytime 4. Outrageous
Singles Promocionais 1. Breathe on Me 2. Touch of My Hand 3. (I Got That) Boom Boom
Canções não Lançadas 1. Conscious 2. Free 3. Get It 4. Graffiti My Soul 5. Hollow 6. Instant Déjà Vu 7. Sacred 8. Shadow [Versão em Espanhol] 9. Shine 10. Stay 11. Look Who's Talking Now 12. Strangest Love
Era Greatest Hits: My Prerogative
CD Greatest Hits: My Prerogative My Prerogative Toxic I'm a Slave 4 U Oops!... I Did It Again Me Against The Music (Feat. Madonna) Stronger Everytime ...Baby One More Time (You Drive Me) Crazy (The Stop Remix!) Boys (The Co-Ed Remix) (Feat. Pharrell) Sometimes Overprotected Lucky Outrageous Born To Make You Happy I Love Rock 'n' Roll I'm Not a Girl, Not Yet a Woman I've Just Begun (Having My Fun) Do Somethin'
B-Sides & Bonus Tracks Don't Let Me Be The Last To Know Toxic [Armand Van Helden Remix Edit] Everytime [Hi-Bias Radio Remix] Breathe on Me [Jacques Lu Cont Mix] Outrageous [Junkie Xl's Dancehall Mix] Stronger [Miguel "Migs" Vocal Mix] I'm a Slave 4 U [Thunderpuss Club Mix] Chris Cox Megamix
Singles 1. My Prerogative 2. Do Somethin'
Single Promocional 1. Chris Cox Megamix
Canções não Lançadas 1. Giving It Up For love 2. Like I'm Falling 3. Money Love and Happiness 4. Ouch 5. Take Off
Era B in the Mix: The Remixes
CD B in the Mix: The Remixes Toxic (Peter Rauhofer Reconstruction Mix) Me Against The Music (Justice Remix) Touch My Hand (Bill Hamel Remix) Breathe On Me (Jacques Lu Cont's Thin White Duke Mix) I'm A Slave 4 U (Dave Aude Slave Driver Mix) And Then We Kiss (Junkie XL Remix) Everytime (Valentin Remix) Early Mornin' (Jason Nevins Remix) Someday (I Will Understand) (Hi-Bias Signature Radio Remix) Baby One More Time (Davidson Ospina 2005 Remix) Don't Let Me Be The Last To Know (Hex Hector Club Mix) (Edit)
B-Sides & Bonus Tracks Stronger [Mac Quayle Mixshow Edit] I'm Not a Girl, Not Yet a Woman <[Metro Mix] Someday (I Will Understand) [feat. MCU] [Gota Remix] Toxic [Peter Rauhofer Reconstruction Mix Radio Edit] I'm a Slave 4 U [Dave Audé Slave Driver Extended Mix]
Single Promocional 1. And Then We Kiss (Vinil)
Era CD/DVD Britney & Kevin: Chaotic
CD/DVD Britney & Kevin: Chaotic Chaotic Someday (I Will Understand) Mona Lisa
B-Sides & Bonus Tracks Over To You Now Someday (I Will Understand) (Hi-Bias Signature Radio Remix)
Singles 1. Someday (I Will Understand)
Canções não lançadas 1. And Then We Kiss (Versão Original)
Era "Blackout"
CD Blackout Gimme More Piece of Me Radar Break the Ice Heaven on Earth Get Naked (I Got a Plan) Freakshow Toy Soldier Hot as Ice Ooh Ooh Baby Perfect Lover Why Should I Be Sad
B-Sides & Bonus Tracks Everybody Get Back Outta This World Gimme More (Paul Oakenfold Remix) (iTunes and Japan) Gimme More (Juke XL Dub) (iTunes and Japan) Gimme More (Stone Bridge Dub Mix) (iTunes Italy and Switzerlad)
Singles 1. Gimme More 2. Piece of Me 3. Break the Ice
Singles Promocionais 1. Radar 2. Ooh Ooh Baby 3. Toy Soldier
Canções não Lançadas 1. 911 2. All The Way 3. Beautiful Night 4. Boyfriend 5. Crucify Me 6. Cry (ou Tear) 7. Downtown 8. Dramatic 9. Grow 8. Guilty 9. Just Let Me Go 10. Hooked On 11. Love 12. Motherlove 13. One Of A Kind 14. Pull Out 15. State Of Grace 16. Rebellion 17. Red Carpet 18. Somewhere 19. Just Yesterday 20. Hooked On (ou Sugarfall) 21. To Love, Let Go 22. Kiss You All Over 23. Welcome To Me 24. When U Gon Pull It (ou Pull Out) 25. Who Can She Trust 26. Baby Boy 27. All That She Wants 28. Dramatic 29. Come And Get Me 30. Abroad 31. Tell Me What You're Sippin' On 32. Red Hot Lipstick
Era "Circus"
CD Circus Womanizer Circus Out From Under Kill The Lights Shattered Glass If U Seek Amy Unusual You Blur Mmm Papi Mannequin Lace and Leather My Baby
B-Sides & Bonus Track Radar Rock Me In Phonography Amnesia Quicksand Trouble Rock Boy
Singles 1. Womanizer 2. Circus 3. If U Seek Amy 4. Radar 5. Unusual You
Singles Promocionais 1. Kill the Lights
Canções não Lançadas 1. Follow My Fingers 2. Look Who's Talking 3. Take The Bait 4. Telephone 5. This Kiss 6. Whiplash
Era "The Singles Collection"
CD "The Singles Collection Standard Edition" 3 ...Baby One More Time (You Drive Me) Crazy (The Stop Remix!) Born To Make You Happy Oops!...I Did It Again Stronger I'm a Slave 4 U I'm Not a Girl, Not Yet a Woman Boys (The Co-Ed Remix) (com Pharrell Williams) Me Against the Music (com Madonna) Toxic Everytime Gimme More Piece Of Me Womanizer Circus If U Seek Amy Radar
CD/DVD "The Singles Collection International Edition"
CD: Todas as faixas da versão Standart + "I'm Not a Girl, Not Yet a Woman"DVD: Vídeo de todas as faixas da versão Standart, exceto: "Boys (The Co-Ed Remix) (com Pharrell Williams" e "3"BOX + DVD (Ultimate Fan Collection) "The Singles Collection"CDs Singles:Todas as faixas da versão internacional + "Sometimes", "From the Bottom of My Broken Heart", "Lucky", "Don't Let Me Be the Last to Know", "Overprotected", "I Love Rock 'n Roll", "Outrageous", "My Prerogative, "Do Somethin'", "Someday (I Will Understand)" e "Break the Ice"CDs Singles - Bonus Track:"Autumn Goodbye", "I'm So Curious", "I'll Never Stop Loving You", "Thinkin' About You", "Deep In My Heart", "Heart", "Walk On By", "Intimidated", "I Run Away", "Mona Lisa" e "Everybody"CD Singles - Remixes:"Born To Make You Happy (Kristian Lundin Bonus Remix)", "Don't Let Me Be The Last To Know (Hex Hector Radio Mix)", "Overprotected (The Darkchild Remix)", "I'm Not A Girl, Not Yet A Woman - Metro Remix", "Me Against the Music (Passengerz vs. The Club Remix)", "Toxic (Bloodshy & Avant's Intoxicated Remix)", "Everytime (Above & Beyond Club Mix)", "Outrageous (Junkie XL's Dancehall Mix)", "My Prerogative (Armand Van Helden Remix)", "Do Somethin' (Thick Vocal Mix)", "Gimme More (Paul Oakenfold Remix)", "Piece of Me (Bloodshy & Avant's Boz O lo Remix)", "Womanizer (Kaskade Club Mix), "Circus (Tom Neville's Ring Leader Mix)", "If U Seek Amy (Crookers Remix)", "Radar (Bloodshy & Avant Remix) e "3 (Groove Police Club Mix)"DVD:Vídeo de todas as faixas da versão Standart exceto: "Boys (The Co-Ed Remix) (com [Pharrell Williams])" e "3" + os vídeos de: "I'm Not A Girl, Not Yet A Woman", "Sometimes", "From the Bottom of My Broken Heart", "Lucky", "Don't Let Me Be the Last to Know", "Overprotected", "I Love Rock 'N' Roll", "Outrageous", "My Prerogative, "Do Somethin'", "Someday (I Will Understand)" e "Break the Ice"BOX + DVD (Ultimate Fan Collection) "The Singles Collection D2C Version - Britney.Com Exclusive Edition"Todo o conteúdo do "BOX + DVD (Ultimate Fan Collection) - The Singles Collection" incluindo o Vídeo do Single "3"Single 1. 3Canções não Lançadas 1. It's All In The Game
Era "Femme Fatale" Músicas1.Till The World Ends 2.Hold It Against Me 3.Inside Out 4.I Wanna Go 5.How I Roll 6.(Drop Dead) Beautiful (Feat. Sabi) 7.Seal It With A Kiss 8.Big Fat Bass (Feat. Will.I.Am) 9.Trouble for Me 10.Trip to Your Heart 11.Gasoline 12.CriminalBônus (Deluxe)13.Up N' Down 14.He About to Lose Me 15.Selfish 16.Don’t Keep Me WaitingBônus (Deluxe - Japão)17.ScarySingles1.Hold It Against Me 2.Till The World Ends 3.I Wanna Go 4.CriminalMúsicas Não Lançadas1.Antidote 2.Every Day 3.Fed-Ex 4.Femme Fatality 5.Insane 6.Pleasure You (feat. Don Philip) 7.Poison 8.Tear the Club Up 9.Unbroken