You were a fan of the idol group called "CRYPT0N", a six member group including Kagamine Rin, Kagamine Len, Megurine Luka, KAITO, MEIKO, and the main singer, Hatsune Miku. They posted their songs and performances on Niconico and YouTube and once they exploded in popularity they were able to sign with a label to go on tour... You bought a ticket to the front and see hologram versions of the singers before said characters "broke" the screen and the real singers were up there, you saw Miku.