Sing along with her. She'll stop almost instantly.
My little nephew always sang "She don't like the meat but she sure likes the bone!"
My sister insisted on having her daughters birthday dinner to some expensive fancy club restaurant place for her 12th birthday. They usually play club music while you hang out and eat but when they bring you the cake they play a song louder while everyone cheers. Well... [this was the song](https://youtu.be/vYMxOzxKYYo?t=1m
) played for a group of 12 year olds.
¯\\_(ツ)_/¯ I thought it was the funniest thing ever.
Get them addicted to Death Metal, it'll stop real quick.
Either from not wanting to sing the lyrics or from the hoarseness of not knowing how to scream / growl properly.