Do you know UTAU?
This is a tool of music and it can make singing voice.
Like this
http://www.youtube.com/watch?v=I65WnhB_yJU
At this video, singer is Kasane Teto.
She is a subspecies of Hatsune Miku.
UTAU can make many songs with voices.
This is Yokune Ruko.
http://www.youtube.com/watch?v=ZY5yGJ-bBKA
I like her better than Teto.
There are many UTAU singers on the Internet.
Suiga Sora
http://www.youtube.com/watch?v=pFSg2XN_9Nw
Todoroki Eiichi
http://www.youtube.com/watch?v=Nc64WR1c1os
Kurane Zanda(his voice actor is an American:-) )
http://www.youtube.com/watch?v=xMAuCeaJB0s
Camila Melodia(She speaks Japanese, English and Spanish!)
http://www.youtube.com/watch?v=ve1WM2_76ms
I'm a voice actor of Takano Yuki and Maki.
http://www.youtube.com/watch?v=rRTmOOzDEIM
(Right:Maki Left:Yuki)
UTAU is very useful and interesting.
If you interested in, why don't you use it?
You can download UTAU here.
http://utau2008.web.fc2.com/