I honestly don't know how the celebs do it. I'd completely forget the routine midway through on the night and not be able to recover it! My mind would go blank under the studio lights.
Some of the celebs are seasoned performers but some aren't! And most are probably used to pre-recorded projects where you can do extra takes as required.
I'm surprised it hasn't happened more over the years, complete disaster as opposed to missing a few steps/a short segment and picking it back up again!
Really scary stuff. My worst nightmare would be, being sewn into my costume and not being able to go to the loo 20 times,but maybe that’s just my age