"it is up to the individual singer to decide where the song demands it,"
And it is equally up to the listener to decide whether it enhances the song or whether it acts as an intrusion - both points of view are as important as one another.
Of course the final decision rests with the singer whether to use it or not, but audience has every right to say it doesn't fit the song.
Smone singers (no name - no pack-drill) can't handle constructive criticism and reall should confine their singing to the bath - nothing wrog with having a rubber duck as a listener if they don't want a response.
Rachel's singing, to my mind, is not unsimilar to everything that is wrong with C.C.Es obsession with competition singing which, in some cases has turned potentially good singers into prize-obsessed clones.
Jim Carroll