If my voice suddenly frozed on stage, what should I do?

It almost happened and gratefulness to that, I had to terminate my whole concert! What should i do back and after?If my voice suddenly frozed on stage, what should I do?
On the day of your concerts, dont use your voice for ANYTHING. Don't speak to anyone. Maraiah Carey uses that method to preserve her voice before concerts. She only writes down everything she wants.
hold on to your voice running an hour before the concert. hum elevated and low keep you self relaxed and your voice moving consequently get on stage and preserve going with it.
Relax, drink hose, vocalize before the concert, own a throat lozenge maybe.
un-frozed it.