Jennifer McMahon - My Tiki Girl (ff)

Via Amazon:

Maggie was looking for a friend in Dahlia. She never guessed she'd find love, too.

All the tenth-grade girls hate Dahlia Wainwright—a smart, natural beauty and freaky outsider all in one. And that's exactly what Maggie Keller is drawn to, for she herself is an outsider, having withdrawn from the high school elite crowd after a car accident that killed her mother—an accident for which she blames herself. But Dahlia's friendship—a manic journey into new identities and outrageous behavior— transforms Maggie in ways she could never have imagined. In her stunning first young adult novel, bestselling adult author Jennifer McMahon paints a lush portrait of the healing power of love.