will.i.am
The Tony Rich Project
Stevie Wonder
Ozomatli
Sheryl Crow & Ahmed Al Harmi
India.Arie
Melissa Etheridge & Barack Obama
Lenny Kravitz
Robin Thicke
Maroon 5 & Barack Obama
USHER & Barack Obama
BeBe Winans
Wilco
James Taylor
Jennifer Hudson
Lionel Richie
Death Cab for Cutie
Common & Muhsinah
Lyrics for this song have yet to be released