Thank You, Lucky Stars

Thank You, Lucky Stars by Beverly Donofrio
It's the first day of fifth grade, and Ally is psyched. She and her best friend, Betsy, are in the same class, and have already planned on singing in the annual talent show together. But it's not long before she sees that Betsy has made a new best friend, and Ally is no longer on her radar screen. Not to mention that the weird new kid, Tina, has glommed on to Ally.