After cutting her teeth in '60s covers band Los Fannys, Spanish singer Luz Casal traded her rock ‘n' roll swagger for soft, buoyant pop. But that doesn't mean her alluring contralto is tame—that distinctive coo owns whatever space it occupies, whether riding waves of smooth jazz, howling over bluesy guitar licks or flexing operatic intensity over upbeat Latin rhythms. Luz has a dozen or so albums to her name and a catalogue brimming with euphoric, affecting pop that transcends genre—it's no wonder her songs have appeared in films by Pedro Almodóvar and Alejandro Amenábar.