Hatsune Miku is a 3D animated hologram, her voice is a vocaloid. In other words she is a software application. Nevertheless she is a worldstar with stadion concerts and an astronomical number of fans. She is a crowdsourced Internet phenomena: her fans composes her hits and choreographs her movements. One of her fans, the renown Dj and composer Keiichiro Shibuya, has made an opera with her as the leading character. Read more about Hatsune Miku and the opera by Keiichiro Shibuya here.