Babymouse: Rock Star by Jennifer Holm.
Babymouse is a legend, a siren, a rock star…at least in her own mind. Babymouse is a typical kid (aside from the whiskers and tail) with a big, big fantasy life to help her through the hazards of public school life: school buses, broken lockers, bullies, math class. But then there’s her beloved band. She has music in her soul, if not actually in her flute. This year, though, things are going to be different. She’s going to be the star of the concert. Or at least move up from last chair.