8th
This is amazing to me. Hatsune Miko is a singing avatar that has become a music star in Japan. Her songs/animations are made by users of the avatar’s crowdsoucing software. This is a live concert of user submitted songs, and as you can see, the crowd is really into it.
From the info PDF:
“HATSUNE MIKU” is a computer music software that enables users to create synthesized singing of unprecedented quality and remarkable realism by just typing in lyrics and melody. Powered by YAMAHA’s VOCALOID (= Vocal + Android) technology, HATSUNE MIKU was developed by Crypton Future Media in Sapporo, and released on August 31st, 2007. And since then, there have been more than 30,000 songs and movies about HATSUNE MIKU that have been posted to popular Video sharing web sites such as YouTube and Nico-Nico-Douga (Japan).”