Had to go to google & learn terms.

Stevie Nicks was a mezzo-soprano, but about 1998, due to her excessive drug use she became a contralto, the lowest of all female voices.

Listening to her sing in the later years I thought she could take Johnnys place in the ...Daddy sang base, while Lorreta said...momma sang tenor song.

Both hot but, truth. Watched Martina nearly faint while trying to cover a few Pat Benatar songs, while Pat could cover Martinas songs with what seemed little effort. Is that just the different octave ranges of each singer or is one simply better than the other???