там же в буклете написано:
Matisyahu: vocals on "Roots In Stereo" and "Strength Of My Life"
Sick Jacken: vocals on "On The Grind" and "Mark My Words"
Boo-Yaa Tribe: vocals on "On The Grind"
Katy Perry: vocals on "Goodbye For Now"
Amy Terrin: vocals on "On The Grind"