I knew, but I never really think about. I just love his voice. It's not overly operatic, but he has amazing range, tone, control, and sustain. I listen to his Christmas album all year long. He sounds amazing whether solo, with Sarah Brightman, or the Muppets. He's always brilliant. Sogno is one of my very favourites. The note near the 3-minute mark always gets me. http://www.youtube.com/watch?v=QI9euK4hvlg