Italian spinto tenor Franco Corelli praised Bocelli's voice after hearing it for the first time during a master class in 1986, in Turin, and he later gave Bocelli private lessons. Puerto Rican soprano Ana Mar a Mart nez, who regularly performs with Bocelli, said, "More than anything, Andrea has something that is unique in that he brings this light that is always around him. And this purity of heart and beauty of sound just touches the listener. It...