One of the most famous tenors in the world, Andrea Bocelli, is celebrating three decades in music. In addition to a concert film and a new album called “Duets,” he’s the subject of a new documentary about his life, “Because I Believe.” It traces his journey from a rural farming village in Tuscany to sold-out stadium concerts with tens of thousands of fans. Andrea joins Tom Power to discuss his journey, including how Luciano Pavarotti helped launch his career, his special friendship with Celine Dion, and which singers he looks up to the most.