My Best Friends Are In A Band?!

Her father had made her whole family move around the word because of his job. Who knew that she would meet five of her very best friends and they would all be put into a band together? Katlynn, mostly known as Kat, and Kai, her twin brother, met their odd best friends while moving, and is then reunited with them. Katlynn doesn't know, but Kai does. So do the boys. Why doesn't Kat know?