Paperback book by J.M. Hope
Book 1 in the Spinsation series
 
Lilly Abbott is experiencing all of the normal things that a girl might as she gets ready to move up to high school. Her grades are up, her parents are supportive, and her voice is serving her well as she gets ready for a career in music. But an unfortunate turn causes Lilly to realize that growing up is more than she bargained and there is something different that she wants out of life. As she learns to spin flags with her school's color guard, Lilly must depend on her new friends to brave through the changes of her youth.