Hatsune Miku Canto Romeo & Cenerentola in Project Diva arcade. please skip to 0:09 to get to the Musica video. and I apologize if it's not very loud :/
I edited this video on windows movie maker uploaded to Youtube on August 1, 2008: with Miku Hatsune, MEIKO, KAITO, Rin Kagamine, and Len Kagamine.all of the clips have Len in it. Archived: link