That tenor is Josh Groban, an american actor who sometimes appears on television sit-coms. His is a version of "Cinema Paradiso" and was not actually played in the film itself. Here's a link to his CD available at Amazon.com containing that song:
http://www.amazon.com/exec/obidos/ASIN/B00005RGNI/qid%3D1009886941/ref%3Dsr%5F11%5F0%5F1/103-6377366-7982250