Over in Japan, Hatsune Miku is a superstar. She’s sold millions of albums and can be seen all over the country, but before last year’s Hatsune Miku: Project Diva F on PS3 and Vita, most western consumers had never even heard of the green-haired popstar. Why is that? Well for one, Hatsune Miku isn’t a real person. Indeed, she’s actually a digital diva, given a voice by a vocaloid program and a legion of devoted musical minds. Sega’s gamble in bringing her west seems to have paid off, too, as Miku has since toured with Lady Gaga and appeared on Letterman, and now returns to PS3 and Vita with Project Diva 2nd.