A little while ago I came across T-Pain's cover of War Pigs by Black Sabbath and it was...actually really good I'm not going to lie. Even Ozzy praised T-pain, tweeting that it was the best cover of the song, ever.
I've heard other covers of songs by unlikely artists like Carl Wheezer's Say it Ain't So or Richard Cheese's My Neck, My Back but those are more in the parody song category, even although the song lyrics aren't changed like Weird Al does it it's more of the subversion of artist/genre that makes it funny.. Eh that's a different conversation
What are some good covers you know of from some unlikely artists?