Mýa is back. The Grammy Award-winning musician has just released Retrospect, her first new album in nearly a decade, and to celebrate, she has a packed summer of performances ahead of her. And while life on the road—with its long days and late nights—can be demanding, the singer recently said that she plans to stay grounded with plenty of sleep, exercise, and, of course, nourishing plant-based foods. It’s no surprise: Mýa has been a passionate v…