Pop girl - Tallia Storm

Fourteen-year-old Storm Hall lives to sing. Forget parties. Forget
boys.
When Storm is told she's going to miss a national competition, to
go on a once-in-a-lifetime holiday to Hawaii, her life is OVER.
What could be worse than having to give up singing to visit an island
paradise? What if her (former) best friend is taking her place?
A family trip to Hawaii is just the beginning. Storm meets a Hawaiian
band who need a singer last minute. When the song is on local
radio the next day all of Storm's dreams are coming true . . .
until the band introduce their singer on air. It's NOT her.