I’m pretty late to the party, but now or never. I found two VOCALOID videos of Miku and Gumi singing the song Dearest that’s from the ED of Inuyasha’s 3rd season. If you haven’t heard that song yet, you can go visit youtube and find it there. There’s a couple of duds though, so try to find the Japanese one with Hamasaki Ayumi singing. After that, hit these links:
I already knew Miku and her cohorts would be able to sing like humans if they simulated the effects of breathing. A human sings on lung capacity and a machine doesn’t. I find that interesting to realize that a perfect singer (i.e. vocaloids) needs to have human flaws if we want to hear good singing.
In any case, my nutbladder nearly exploded when I heard Gumi sing Dearest. Japan, the land of Nutbladder Targetting Weaponry, I salute you.