The term "choir girl" is often used to describe a female singer who participates in a choir, but using synonyms can add variety to your language. Some alternatives might include "chorister" or "chorus member" if you want to describe someone who sings in a group. If you're looking for a more specific term, "cantor" refers to a singer who leads the congregation in church, while "soloist" describes someone who sings alone within a choir piece. Finally, "choral scholar" is a term used in academic settings to describe a student who receives a scholarship for their participation in a choir.