Other forms: choristers
If you sing in your school chorus, you can describe yourself as a chorister. A chorister is either a member or the leader of a choir.
Any organized group of singers can be called a chorus or choir, and anyone who belongs to the group is a chorister. This term is more common when talking about boys or girls who sing in choirs (along with the alternatives choirboy and choirgirl). Chorister comes from the Latin chorus, originally "dance in a circle" or "singers and dancers."