I haven't thought too much about Taylor Swift since the incident where she sang and entire song in the wrong key (probably started on the wrong note and couldn't adjust - guess it could happen to anybody, but somehow I can't picture that happening to say, an Ella Fitzgerald or a Sarah Vaughn, or even an Adele or a Celine Dion
(bold italicized added by TonyMads ...)or any high-profile, professional singer).
chas