Teacher forced to student,student forced to teacher. She had a hole. And some people never learn. A teacher humiliated in her class room. The margin for error in such surgeries is measured in fractions of a millimetre.
There are some exceptions though, who really can sing and made a career based on their singing instead of based on other things, but technically you should count them partly under 1.
She had a hole. For some mysterious reason, we all were to have recorders — not tape recorders — those boring wooden flutes. Albanesi, however, sang with an ease that belied the strength of her highest notes. Do most people who takes singing classes try their hand at a singing career? Examples of bands I love with unusual singers: