KRISTIN CHENOWETH’s startling admission of her chilling Botox use to cure debilitating migraines!

Chenoweth, who made headlines with her recent butt-enhanced Kardashian spoof, told Prevention mag she gets the age-defying injections to help alleviate pain.

"When I was 35, I was having debilitating migraines about once a week," Chenoweth divulged.

 "I went to my doctor in New York, and she said she wanted to give me five shots of Botox across my eyebrows.

"And I said, 'Oh, no. I make my living through my facial expressions.'

"And she said, 'You're not going to have a living if you can't work.'

“So I let her do it, and I haven't had a full-blown headache since."

POP FYI: Botox is a trade name for the neurotoxic protein called botulinum toxin that is produced by the bacterium Clostridium botulinum. The protein causes botulism.