Where would we be without one of the strangest funk/prog/psychadelia acts of the 70s? Parliament (And/or) Funkadelic. Here they are singing one of their more overtly SF-related songs:
Ah, but is it SF? Well, yeah, I think so. It's all about the whole von Danikin Ancient Astronauts nonsense, and Sun Ra's weird life story. Check out these lyrics:
Doin' it up on the Chocolate Milky Way
What's up CC? Have you forgot me?
Are you hip to Easter Island? The Bermuda Triangle?
Heh heh! Well, all right. Ain't nothing but a party!