As Producer/co-producer
- Britney Spears ("Heaven on Earth", "Ooh Ooh Baby")
- Celine Dion ("Surprise Surprise", "One Heart")
- Cobra Starship ("Good Girls Go Bad"
- Kelly Clarkson ("Walk Away")
- Santana ("Feeling You")
- Lindsay Lohan ("Over", "First", "I Live for the Day")
- Hannah Montana (Miley Cyrus's role) ("We Got the Party")
- Katharine McPhee ("Love Story", "Home")
- Raven-Symoné ("Backflip", "What Is Love")
- Jessica Simpson ("A Little Bit" (Chris "The Greek" and Guido Club Mix))
- Kylie Minogue ("Good Like That")
- Backstreet Boys ("Something That I Already Know")
- Hilary Duff ("Little Voice")
- Genta Ismajli ("Planet Me")
Read more about this topic: Kara Dio Guardi Discography