| # | Title | Artist | Length |
|---|
| 1 | Happy- programming:
- Ryan Tedder
- additional engineer:
- Damien Lewis
- assistant engineer:
- Nicolas Essig, Chris Kasych and Richard Woodcraft
- engineer:
- Craig Durrance, Ryan Tedder, Noel Zancanella and Joe Zook
- producer:
- Leona Lewis (task: vocal), Ryan Tedder and Ryan Tedder (task: vocal)
- mixer:
- Phil Tan
- acoustic guitar, drums (drum set) [drums], piano and background vocals:
- Ryan Tedder
- cello:
- Brent Kutzle
- arranger:
- Ryan Tedder
- mixed for:
- RiotProof Productions
- recorded at:
- Abbey Road Studios in St John's Wood, Westminster, London, England, United Kingdom (background vocals), Chalice Recording Studios in Hollywood, Los Angeles, California, United States, Henson Recording Studios in Hollywood, Los Angeles, California, United States, Park Hill Studios in Denver, Colorado, United States and RAK Studios in London, England, United Kingdom
- mixed at:
- Soapbox Studios in Atlanta, Georgia, United States
- recording of:
- Happy
- writer:
- E. Kidd Bogart, Leona Lewis and Ryan Tedder
- publisher:
- Beluga Heights Music, Here’s Lookin’ at You Kidd Music, Lewis Music Publishing, Sony/ATV Music Publishing LLC and Write 2 Live
| Leona Lewis | 4:02 |
| 2 | Meet Me Halfway | The Black Eyed Peas | 3:45 |
| 3 | S.O.S. (Let the Music Play) | Jordin Sparks | 3:32 |
| 4 | Heaven Can Wait | We the Kings | 3:30 |
| 5 | I Want to Know What Love Is | Mariah Carey | 3:36 |
| 6 | Shake My (Promo Only clean edit) | Three 6 Mafia feat. Kalenna | 3:19 |
| 7 | If You Only Knew | Shinedown | 3:46 |
| 8 | Drop It Low (remix) (Promo Only clean edit) | Ester Dean feat. Chris Brown | 3:09 |
| 9 | Drop It Low (Promo Only clean edit) | Ester Dean | 3:09 |
| 10 | Sexy Chick | David Guetta feat. Akon | 3:13 |
| 11 | Never Gonna Be Alone | Nickelback | 3:46 |
| 12 | TiK ToK- miscellaneous support:
- Gary "G" Silver (task: production coordination) and Vanessa Silberman (task: production assistance)
- programming and producer:
- benny blanco and Dr. Luke
- assistant engineer:
- Tatiana Gottwald
- engineer:
- benny blanco, Sam Holland and Emily Wright
- assistant mixer:
- Tim Roberts
- mixer:
- Serban Ghenea and John Hanes
- editor:
- Emily Wright (lead vocals [vocal])
- drums (drum set) [drums] and keyboard [keyboards]:
- benny blanco and Dr. Luke
- phonographic copyright (℗) by:
- RCA/Jive Label Group (in 2009)
- produced for:
- Kasz Money Productions, Inc.
- mixed at:
- MixStar Studios in Virginia Beach, Virginia, United States
- engineered at:
- Conway Recording Studios in Hollywood, Los Angeles, California, United States
- part of:
- Billboard: Greatest of All Time Hot 100 Songs (number: 68) and Billboard: The 500 Best Pop Songs (number: 149)
- recording of:
- TiK ToK
- writer:
- Benjamin Levin, Łukasz Gottwald and Kesha Sebert
- publisher:
- Dynamite Cop Music, Kasz Money Publishing, Matza Ball Music and Where da Kasz At
| Ke$ha | 3:20 |
| 13 | La La La (main) | LMFAO | 3:32 |
| 14 | ¡no Hablo Inglés! (clean version) | Bowling for Soup | 3:34 |
| 15 | Be on You (album version) | Flo Rida feat. Ne‐Yo | 4:03 |
| 16 | Therapy | James Kinney | 3:17 |
| 17 | We Weren't Born to Follow | Bon Jovi | 4:08 |
| 18 | Damned If I Do Ya (Damned If I Don't) | All Time Low | 3:05 |
| 19 | Starstrukk (radio mix clean) | 3OH!3 feat. Katy Perry | 3:23 |
