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In 1992, Italian rock star Zucchero held auditions for tenors to make a demo tape of his song "Miserere", to send to Italian tenor Luciano Pavarotti. After hearing Bocelli on tape, Pavarotti urged Zucchero to use Bocelli instead of him. Zucchero eventually persuaded Pavarotti to record the song with Bocelli, and it became a hit throughout Europe. In Zucchero's European concert tour in 1993, Bocelli accompanied him to sing the duet, and he was also given solo sets in the concerts, singing "Nessun dorma" from Giacomo Puccini's opera "Turandot". Bocelli signed with the Sugar Music label in Milan after Caterina Caselli heard Bocelli sing "Miserere" and "Nessun Dorma" at a birthday party for Zucchero.