All Angels Sissel Hayley Westenra Katherine Jenkins Orla Fallon Anuna Mary-Jess Leverland Jackie Evancho Sasha Lazard Leanne Rimes Filippa Giordano Emma Shapplin Secret Garden Ten Tenors Celtic Woman Michael Crawford Helene Bøksle Steve Green Barbie Scala Canadian Tenors Barbara Dickson Meav Phantom Of The Opera Sissel Kyrkjebo Miriam Stockley Trans-Siberian Orchestra Mediaeval Baebes The Tenors Gregorian Masters Of Chant Il Volo Tanya Tucker Rasmus Seebach Susan Boyle Gustav Holst Tone Damli Chiara Rutter Tonino Baliardo Hanne Boel Britten Damien Leith Chant Scott Bradlee'S Postmodern Jukebox Trio Mediaeval Najoua Belyzel Eric Whitacre T.A.T.U. Gabriel Fauré