The Silver Secret — Sharon M. Draper

Sassy's school is doing a musical performance that is going to be televised, and Sassy wants to sing with the choir. However, it's no secret that Sassy can't sing. But she has also been hiding a big secret . . . for the past year she has been taking pizcolo lessons, and she's quite good at it. Instead of tuneless croaks, she produces lovely, lyrical tones from her silver instrument. But she has to prove to the music teacher not only that she's needed in the show, but also that she can make a difference in the performance.