Trio Mediaeval Chanticleer Mediaeval Baebes Boston Camerata Wicked Tinkers Kings Singers Sequentia Conspirare Rutter Amici Forever Tonino Baliardo Morten Lauridsen Susan Boyle Jose Carreras Chant Rajaton Anonymous 4 Kalenda Maya The Sixteen Cecilia Bartoli Buckaroos New Orleans Syncopators Hilliard Ensemble Vanessa Williams Swingle Singers Vox Angeli Andrea Bocelli Ensemble Organum The King'S Singers The Huelgas Ensemble Neri Per Caso Dawn Upshaw Patricia Barber Tallis Scholars Damien Leith Les Choristes John Rutter Libera Bbc Symphony Orchestra Waverly Consort Tiger Lillies Rias Kammerchor Heralds Robert Shaw Chorale Canadian Brass Oxford Camerata Melashenko Family Singers Katherine Jenkins Keiko Matsui