| # | Title | Length |
|---|
| 1 | Someday (I Will Understand)- programming, engineer and mixer:
- Sean McGhee
- assistant engineer:
- Francesco Periangeli
- producer:
- Guy Sigsworth
- assistant mixer:
- Francesco Perlangeli
- other instruments [all other instruments played and sounds made by]:
- Guy Sigsworth
- piano and lead vocals:
- Britney Spears
- guest background vocals:
- Kate Havnevik
- performer:
- Guy Sigsworth
- recorded at:
- Conway Recording Studios in Hollywood, Los Angeles, California, United States and Frou Frou Central in Kensington, Kensington and Chelsea, London, England, United Kingdom
- mixed at:
- Frou Frou Central in Kensington, Kensington and Chelsea, London, England, United Kingdom
- recording of:
- Someday (I Will Understand)
- writer:
- Britney Spears
- publisher:
- Britney Spears Music, Universal Music–Z Songs and Zomba Songs
| 3:40 |
| 2 | Chaotic- recording engineer:
- Bloodshy & Avant and Tom Soares (drums (drum set) ['Live' Drums])
- miscellaneous support:
- Bloodshy & Avant (task: digital editing)
- other instruments [all other instruments] programming:
- Bloodshy & Avant
- assistant engineer:
- Charles McCrorey and Jonas Östman
- producer:
- Bloodshy & Avant
- mixer:
- Bloodshy & Avant and Niklas Flyckt
- bass:
- Thomas Lindberg
- drums (drum set) ['live' drums]:
- Steven Wolf
- guitar:
- Henrik Jonback
- background vocals:
- Michelle Bell, Emma Holmgren and Britney Spears
- lead vocals:
- Britney Spears
- arranger:
- Bloodshy & Avant and Steve Lunt
- miscellaneous support:
- Murlyn Music AB (task: recorded for)
- recorded at:
- Battery Studios in Midtown Manhattan, New York, New York, United States and Murlyn Studios in Stockholm, Stockholms län, Sweden
- mixed at:
- Murlyn Studios in Stockholm, Stockholms län, Sweden
- recording of:
- Chaotic
- writer:
- Michelle Bell, Henrik Jonback, Christian Karlsson and Pontus Winnberg
- publisher:
- Elleganza Music Publishing, Murlyn Song AB, Universal Music Corp. and Universal PolyGram International Publishing, Inc.
| 3:35 |
| 3 | Mona Lisa- recording engineer:
- Bloodshy & Avant and Niklas Flyckt (drums (drum set))
- other instruments [Instruments] programming:
- Bloodshy & Avant
- producer:
- Bloodshy & Avant
- mixer:
- Niklas Flyckt
- bass:
- Henrik Jonback
- drums (drum set):
- Per Eklund
- guitar:
- Henrik Jonback and Ben Mauro
- percussion:
- Fausto Cuevas III
- background vocals:
- Stephanie Alexander, Blackcell, Gromyko Collins and Emma Holmgren
- lead vocals:
- Britney Spears
- arranger:
- Bloodshy & Avant
- recorded at:
- Conway Recording Studios in Hollywood, Los Angeles, California, United States (other vocals [vocals])
- mixed at:
- KhaBang Studio in Stockholm, Stockholms län, Sweden
- engineered at:
- Murlyn Studios in Stockholm, Stockholms län, Sweden
- recording of:
- Mona Lisa
- writer:
- Teddy Campbell, Dave Kochanski and Britney Spears
- publisher:
- Britney Spears Music, Kokoki Music and Zomba Songs
| 3:27 |
| 4 | Over to You Now | 3:43 |
| 5 | Someday (I Will Understand) (Hi-Bias radio remix) | 3:47 |
