With a style from decades before her time and a voice for the ages, Andra Day creates what she calls "retro-pop-soul" music. "It's a blend of jazz, soul, doo-wop, plus a little bit of rock and a little bit of hip-hop as the underbelly," she says. As comfortable as she is with contemporary R&B, it is the emotions and voices of Billie Holiday, Nina Simone, Amy Winehouse, Adele, Lauryn Hill and Erykah Badu that call to Andra the loudest.