After emerging in the late 20th century in a duet with Luciano Pavarotti, Italian vocalist Andrea Bocelli has established himself as an enduring international star of both classical and pop music, even earning the label "the fourth tenor." With a rich tone that moves gracefully between powerful opera arias and tender pop balladry, Bocelli has charted in multiple countries with every album since his 1994 debut, Il Mare Calmo Della Sera. Often referred to as his fourth LP, the 1997 pop compilation Romanza marked his breakthrough in the U.K. and U.S. and topped the charts in over...