RTFA: http://www.youtube.com/watch?v=Q32IX6_xAmQ&eurl=ht…

suketchさんの作品（ニコニコ動画から転載）．

Okay – this one takes a moment to parse. Say it with me now: さんの作品（ニコニコ動画から転載）

^_^

As I understand it, this video is a cover of a Japanese pop song. What’s remarkable is that the vocals are entirely synthesized. There’s probably not a single organic sound in the thing.