Justin Hayward John Adorney David Foster Karen Carpenter Rumer Ren Harvieu Carpenter Mama Cass Mark Dwane Michael Rother Percy Faith Tim O'Brien Rebekah Del Rio Sam Brown Uncle Earl Mark O'Connor Phoebe Snow Mantovani Sam Bush Bert Kaempfert Cadillac Sky Rev. Gary Davis Alice Russell Sarah Brightman Croce Joan Armatrading Tijuana Brass Madeleine Peyroux Barbra Streisand Sophie Milman Barry Manilow Oren Lavie Andrea Bocelli Bread Jonsi Tokio Hotel The Carpenters Paloma Faith Neil Diamond Neil Finn Two Steps From Hell Tracy Chapman James Blunt John Legend Crowded House James Taylor Carly Simon Bonnie Raitt London Grammar