Cthulhu and vampire filk music

It's like folk music except with sci-fi, fantasy and horror themes. So they call it filk music. From Wired:

"We write about all the great fantasy topics ... dragons, unicorns, vampires, castles, wizards, witches, what have you," she continues in a soft voice with a hint of Appalachian drawl. "All the great contemporary hard science topics, too -- computers, space, time travel, nanotechnology, you know -- this 'n' that. And then, hybrids. Vampire computers. Vampire kittens. The computer necromancer who raises your PC from the dead." snip Although the music receives little broadcast exposure, it has inspired a vibrant online and peer-to-peer scene. The Filk.com website points to mailing lists and local events, and offers the world's only all-filk internet radio station. Here, you might find the Kinks' "Lola" redone as "Yoda," or "Chattanooga Choo-Choo" as "Lair of Great Cthulhu."