I love them, "Amazing Grace" is my favourite and also "I believe in you" with Celine Dion.
Simon Cowell was the guy who formed this group btw, picking guys from 4 different nations.
American Tenor - David Miller
Spanish Baritone - Carlos Marin
French Pop singer - Sebastien Izambard
Swiss Tenor - Urs Bühler
SO, my favourite performances:
embedding disabled, sorry http://www.youtube.com/watch?v=wF1xkcrvTwU
I believe in you