Hatsune Miku sings "Gravity" <br /><br />Hatsune, Miku is Vocaloid program. <br />http://en.wikipedia.org/wiki/Vocaloid <br /><br />This work was brought from the place below. <br />En provenance de Nico Nico Douga : <br />http://www.nicovideo.jp/watch/sm5247194
