Which reminds me...
I was in the studio's with the producer of the movie The Producers. They bitched, moaned and ke-vetched over what to do about a certain (female) person's "singing" in that movie. They said they nearly had to fix every 2nd note out of her mouth in post. The most tedious thing they could have ever done.
Most of us...ok...i....had no idea how much 'fixing' goes on in the studio. Hats off to the pros who go out and do it LIVE.