Here are some more YA (young adult) books about teenage rockers:
Cherokee Bat and the Goat Guys by Francesca Lia Block
I don't usually like magical realism, but I love Francesca Lia Block's Weetzie Bat series.
Fat Kid Rules the World by K.L. Going
The main character is a morbidly obese teenage boy who befriends the coolest (and skinniest) guitar god in the Lower East Side.
Pop Princess by Rachel Cohn
This wonderfully escapist novel is about a teen idol who secretly prefers Paul Weller over her own brand of bubblegum pop.