A Random

SCIFI.radio story

Earth hosts a cosmic talent show for extraterrestrial performers who want to plug us into a power grid and use us as living batteries even though they can all do credible singing impressions of Ethel Merman and cannot be destroyed by a crowd of people with pitchforks and torches , but scientists create a new weapon which turns them into weird rocks.
The End.and then they kill us all.
The End.