Break It Up (Someone Else's Fairytale #2.5)
E.M. Tippetts

The only problem is that she's in love with one band member, dodging the unwanted attention of another, and desperate to keep her turbulent past under wraps. Triple Cross have "nice guy" appeal, approved of by parents the world over, but have just let go their longtime manager, who controlled their clean image and media exposure with an iron fist. When Zach Wechsler, the object of Kyra's affection, begins to show interest, she has to be careful.
Surely one girl can't destroy a band that's been together for ten years... only what if she can? Kyra knows she's one bad decision away from ruining everything she's worked for, and taking the hottest act of her generation down with her.