Andrea Bocelli has been called "the fourth tenor." A disciple of Luciano Pavarotti and Zucchero Fornaciari, the blind, Tuscany-born vocalist emerged as one of the most exciting voices in contemporary opera during the late 20th century. His participation in Pavarotti's 1992 hit "Miserere" and Fornaciari's 1993 world tour helped propel him to international attention. Opera represented only one side of his musical persona, however, as Bocelli fared equally well as a pop ballad singer, recording duets with such singers as Celine Dion, Sarah Brightman, and Eros Ramazzotti. Al Jarreau, who sang with Bocelli during Night of the Proms in November 1995, aptly praised the vocalist when he said, "I have had the honor to sing with the most beautiful voice in the world."