It has been a gradual process. First she made a CD, despite the fact she contains no physical preseance in our world. Next, she held a concert, in which her animated form appeared for hundreds of concert goers at "Animelo Summer Live".
But that isn't good enough for Japan's most popular virtual idol. She won't stop until she physically enters our dimension and interacts with us personally.
I, for one welcome our new Japanese singing idol overlord: