This is shiver-inducing and hilarious by turns. Just like Dr. Horrible! 3thirdsX1idiot (Three Thirds of an Idiot) is a college student who admits she may have weirded her roommate out by singing several parts of the song multiple times while making this recording. If one roommate's sanity had to be sacrificed for us to see this video, I consider it a price worth paying.
(Thanks for the tip, Tomb: R.O.A.C.H.!)