Me: Perhaps you could try singing the song in the same key but an octave lower than the original, as you seem to be struggling on the odd note? [i] (trying to be as polite as possible at a rehearsal where the singer's face and neck were bright red due to the strain of trying, and failing, to sing the main vocal in tune).[/i]
Singer: Yeah, but I just don't think I'd be doing the song justice if I did that.
Me: Hang on, you think you would be doing the song more justice by singing it out of tune than by singing it in tune an octave lower?
Singer: Yeah.