Circus (Britney Spearsin albumi)
Kappaleet

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| Nro | Nimi | Säv&san | Tuottaja(t) | Kesto |  |  |  |  |  |
| 1. | Womanizer | Nikesha Briscoe, Rafael Akinyemi | K. Briscoe, The Outsyders | 3.43 |  |  |  |  |  |
| 2. | Circus | Lukasz Gottwald, Claude Kelly, Benjamin Levin | Dr. Luke, Benny Blanco | 3.12 |  |  |  |  |  |
| 3. | Out from Under | Shelly Peiken, Arnthor Birgisson, Wayne Hector | Guy Sigsworth | 3.54 |  |  |  |  |  |
| 4. | Kill the Lights | Nathaniel Hills, James Washington, Luke Boyd, Marcella Araica | Danja | 3.59 |  |  |  |  |  |
| 5. | Shattered Glass | Gottwald, Kelly, Levin | Dr. Luke, Benny Blanco | 2.53 |  |  |  |  |  |
| 6. | If U Seek Amy | Max Martin, Shellback, Savan Kotecha, Alexander Kronlund | Max Martin | 3.37 |  |  |  |  |  |
| 7. | Unusual You | Christian Karlsson, Pontus Winnberg, Henrik Jonback, Kasia Livingston | Bloodshy & Avant | 4.23 |  |  |  |  |  |
| 8. | Blur | Hills, Stacy Barthe, Araica | Danja | 3.09 |  |  |  |  |  |
| 9. | Mmm Papi | Britney Spears, Henry Walter, Adrien Gough, Peter-John Kerr, Nicole Morier | Let's Go To War | 3.22 |  |  |  |  |  |
| 10. | Mannequin | Spears, Harvey Mason, Jr., Rob Knox, James Fauntleroy II | Harvey Mason, Jr., Rob Knox | 4.06 |  |  |  |  |  |
| 11. | Lace and Leather | Gottwald, Levin, Frankie Storm, Ronnie Jackson | Dr. Luke | 2.48 |  |  |  |  |  |
| 12. | My Baby | Spears, Sigsworth | Guy Sigsworth | 3.20 |  |  |  |  |  |
| Bonuskappaleet, kaikilla versioilla |
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| Nro | Nimi | Säv&san | Tuottaja(t) | Kesto |  |  |  |  |  |
| 13. | "Radar" (Standard on all editions of "Circus")  | Karlsson, Winnberg, Jonback, Balewa Muhammad, Candice Nelson, Ezekiel "Zeke" Lewis & Patrick "J.Que" Smith | Bloodshy & Avant, The Clutch | 3.49 |  |  |  |  |  |
| Bonuskappaleet, Deluxe Edition |
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| Nro | Nimi | Säv&san | Tuottaja(t) | Kesto |  |  |  |  |  |
| 14. | "Rock Me In" (Deluxe Edition bonus track)  | Spears, Greg Kurstin, Morier | Greg Kurstin | 3.17 |  |  |  |  |  |
| 15. | "Phonography" (Deluxe Edition & Britney.com  bonus track)  | Karlsson, Winnberg, Jonback, Muhammad, Nelson, Lewis, Smith | Bloodshy & Avant, The Clutch | 3.35 |  |  |  |  |  |
| Bonuskappaleet |
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| Nro | Nimi | Säv&san | Tuottaja(t) | Kesto |  |  |  |  |  |
| 16. | "Trouble" (iTunes Pre-order bonus track)  | Karlsson, Winnberg, Jonback, Muhammad, Nelson, Lewis, Smith | Bloodshy & Avant, The Clutch | 3.35 |  |  |  |  |  |
| 17. | "Amnesia" (Japanese & Britney.com bonus track)  | Fernando Garibay, Kasia Livingston | Fernando Garibay | 3.56 |  |  |  |  |  |
| 18. | "Quicksand" (Eurooppalainen iTunes bonusraita, poislukien Yhdistynyt kuningaskunta)  | Lady Gaga, Garibay | Fernando Garibay | 4.05 |  |  |  |  |  |
| 19. | "Rock Boy" (7Digital Europe, Amazon UK MP3, BigPond Music (Australia) and Dada Music Store (Italy) bonus track)  | Tina Parol  | Danja  | 3.23 |  |  |  |  |  |
| 20. | "Womanizer" (Kaskade Radio Edit #2 Britney.com MP3 Premium Edition bonus track)  | Briscoe, Akinyemi | Kaskade | 3.12 |  |  |  |  |  |
| 21. | "Womanizer" (Junior Vasquez Superstar Mix Britney.com MP3 Premium Edition bonus track)  | Briscoe, Akinyemi | Junior Vasquez | 7.29 |  |  |  |  |  |