Julio Iglesias is a master of Latin pop romance, but when he pairs up with other great gallants, the results are twice as ravishing. He binds with Stevie Wonder for a bewitchingly soulful outing in “My Love,” and sweeps bystanders off their feet alongside Alejandro Fernández on lush rendezvous “Dos Corazones, Dos Historias.” On the mesmeric “All of You,” he makes R&B magic with Diana Ross.