church choir members.
They are choristers
A choir member, or if they sing by themself a Cantor . A cantor is a Jewish term, in the church of England, Anglican or Espiscolpelian church when a chorister sings along they are a soloist
No!
A Duet
choirmaster
Orchestras
Octet.
Choir, harmony
The singers in a vocal group are divided according to their height.
One of Adele's backup singers is named Martine, who sang with her at the Grammy's. Martine started off singing in church.
It is called a choir or a band
Well they can be singing a duet.
Id call them a musical group or 'band'.