Alone in the Crowd (Sweet Valley High #28) by Francine Pascal

Secret song...

Lynne Henry is tall, awkward, and painfully shy. The one bright spot in her life is her songwriting. In her room, playing her guitar, Lynne forgets how lonely she is and becomes someone special.

When The Droids, Sweet Valley High's most popular rock band, announce a songwriting contest, Lynne enters it. But she is so insecure about her talent that she submits her song anonymously.

As soon as they hear Lynne's song, The Droids know they've got a winner. Guy Chesney, the attractive lead guitarist for the band, vows to find the songwriter, no matter how long it takes.

Only Elizabeth Wakefield knows Lynne's secret. Can she persuade Lynne to come out into the open and share her talent, or is Lynne destined to remain unnoticed?