In Japan, strange software called "Hatsune Miku" is popular recently. "Hatsune Miku" is the name of the girl. This software is a synthesizer. The difference with the normal synthesizer software is the point that can use the words; we can let her sing a song.

The Japanese middle and high school student let her sing various songs. In addition, they upload it in Web with her figure as an animation. All videos were made by amateur young boys.

Song: Christmas Hatsune Miku -Silent Night CM
Maker Hikōshiki Hatsune Mix (メーカー非公式 初音みっくす, Mēkā Hikōshiki Hatsune Mikkusu?, lit. Maker Unofficial: Hatsune Mix) is a Japanese manga written and illustrated by Japanese artist Kei. The story is based on the first character in the Vocaloid Character Voice Series named Miku Hatsune.