Great question, I used to wonder this myself. I found out that "its not called a singles because they're singing by themselves, its called a single because that is the OLNY song on the album....just a 'single' song."
hope i helped :P
Opera singers all sing all kinds of operas. There are no special terms for singers of comic operas.
Someone who sings is typically referred to as a "singer," while a person who plays an instrument is called a "musician." If they specialize in a specific instrument, they might be identified by that instrument, such as "guitarist" or "pianist." Collectively, both singers and instrumentalists can be considered performers or artists in the music field.
You can call that person a "singer" or you can call that person a "vocalist."
choirmaster
Orchestras
Someone who does not want to get married can be referred to as single, unmarried, or a bachelor/bachelorette.
the internet has lots of things look up that singers address and mail them a demo or you can find their number and call them
Octet.
Choir, harmony
It is called a choir or a band
Well they can be singing a duet.
A Nanotechnologist.