Which Vocaloid song is better?
1) World is mine -Miku
2) Rolling girl -Miku
3) Just be friends -Luka
4) Kokoro -Rin
5) Black rock shooter -Miku
6) Popipo -Miku
7) Meltdown -Rin
8) Matryoshka -Miku & Gumi
9) Good night last night -Miku
10) Two breaths walking -Miku