I know Hello Kitty collaborates with other products but never I see it coming on Vocaloid.
Hello Kitty X Hatsune Miku produced by the Tokyo Kawaii Magazine team.
They should be Limited Version. At this moment the shirt is planned to sold in 3500yen, and the rubber strap is 840yen(Ja tax included) each.
The T-Shirts and rubber stamps should be selling at Miku concert in ANIME EXPO 2011 in Los Angeles.
First Miku with Toyota, now with Hello Kitty. I like the Hello Kitty more tho. LOL
Are you going for Hello Kitty + Vocaloid or Miku?