I don't know what goes on in recording studios these days
but I heard a chap on the radio say that a lot of automatic
pitch correction goes on for the benefit of tone deaf singers.
He also said that the effect is easy to recognise.

Can anyone suggest a good example that I might hear on the radio?
I presume that the effect is the yodelling sound where the voice
changes in mid-note but for all I know the singers might sound like
that naturally.

--
Roger.