Virtual pop star Hatsune Miku performs on Letterman

Hatsune Miku is a virtual pop singer that gets her voice courtesy of Crypton Future Media, which is based out of Japan. Using various Vocaloid synthesizers, she belts out songs and, despite her lack of flesh and blood, enjoys quite a fan base. Thanks to increasingly sophisticated projection technology, Hatsune has taken to more than one stage to perform songs, …