Hatsune Miku

Hatsune Miku is a virtual pop star and a Vocaloid software character. She is not a real person, but a singing synthesizer voiced by Japanese actress Saki Fujita. Anyone can use the software to create songs for her. She is famous for her long, turquoise pigtails and performs as a hologram at sold-out concerts worldwide. Her name means "the first sound of the future."