Ernie Halter David Ryan Harris Brian Mcfadden Melanie Fiona Colby Calliat Cameron Mitchell Ernie Smith Eric Hutchinson Roberta Flack Bob Evans Shane Filan Shanice Kian Egan Deniece Williams Ryan Chance Dave Barnes Bobby Brown Vusi Mahlasela Allen Stone Pj Morton Mango Groove Justin Nozuka Juluka Johnny Clegg And Savuka Laura Shigihara Michael Heart Patrice Rushen Sister Hazel Mpb Jon Mclaughlin Go Lem System Riley Smith Doozy Michael Tolcher Minnie Riperton James Hersey Bossa Nathan Angelo Jason Mraz Ben Rector Jj Heller Graham Colton Sidestepper Adventure Time No Angels Putumayo Brett Young Clay Walker Jimmy Needham