This is Hatsune Miku 노래 one of her 더 많이 poplular songs,The World is Mine! I do 사랑 this song, its awesome. If any of 당신 are big enough fans, 당신 can see that its a shortend version for the 음악회, 콘서트 itself.

Look miku is doing "Ieven Polkka"