Complations and guest contributions, assorted by year.

2003
* "The Remedy" appeared on Cities 97 Sampler Vol. 15

2004
* "You and I Both" appeared on Cities 97 Sampler Vol. 16
* "I Melt with You", from the 50 First Dates Soundtrack
* "Summer Breeze", from the Everwood: Original TV Soundtrack

2005
* "Shy That Way", with Tristan Prettyman from the album twentythree
* "Good Old-Fashioned Lover Boy", from the album Killer Queen: A Tribute to Queen
* "Keep on Hoping", with Raul Midon from the album State of Mind
* "A Hard Rain's a-Gonna Fall", from the album Listen to Bob Dylan: A Tribute
* "Winter Wonderland", from the album Sounds of the Seasons: the NBC Holiday Collection
* "Unravel", "The Boy's Gone", and "Plain Jane", from the album Hear Music XM Radio Sessions Volume 1

2006
* "The Joker/Everything I Own", a duet on the Happy Feet soundtrack with Chrissie Hynde

2007
* "Slummin' In Paradise", background vocals for Mandy Moore, from the album Wild Hope
* "Beauty in Ugly" for Ugly Betty

2008
* "Something to Believe In", with Van Hunt and Jon McLaughlin from the album Randy Jackson's Music Club, Vol. 1