Alfred Matthew Yankovic (mostly known as "Weird Al") voices Darkseid in Teen Titans Go! in the episode "Two Parter". He is a famous musician known for his many parody songs.
Roles Outside Teen Titans Go!
Pal.0/Weird Pal (Uncle Grandpa)
Probabilitor (Gravity Falls)
Cheese Sandwich (My Little Pony: Friendship is Magic)
Weird Al (The Simpsons)
Wreck-Gar (Transformers Animated)
Banana Man (Adventure Time)
Milo Murphy (Milo Murphy's Law)
Papa Kotassium (Mighty Magiswords)
In the episode "Two Parter", Cyborg says that Darkseid sounds like Weird Al considering the fact that Darkseid is actually voiced by Weird Al in the series. Darkseid then states that Weird Al is evil by making parodies of great songs. Then Darkseid says he is going to destroy the world along with their precious Weird Al, which causes Darkseid to laugh.
He also appeared as an animated version of himself in Sabrina: The Animated Series.