If she got it right first time, I would be as impressed as I was with the finished product.
NB. Every time someone records a song, they are really singing.
Yes, of course they are, but when it's recorded in a studio any rawness and flaws are edited out. Not the case with live camera recording.
It's not her job to get it right first time, it's her job to do it to the best of her ability take after take so they have plenty of options to choose from when putting the film together.