Sad to read people calling The Happening a deep cut and obscure. I reckon it's probably the best song on the album (maybe, too many to choose). Cyrus has good taste, I think she covered The Replacements a few years ago too.
She was alright in one of the latest episodes of Black Mirror, and she did a cover of a NIN song (Head like a hole) I suppose anything goes these days in the world of music.
Acid Reign, about as obnoxious British (punk) thrash metal from the 80's as you can get, now sort of reformed and have a new album out in a few weeks. They've done a cover version of a Suzanne Vega song on it (Blood Makes Noise) and she agreed to sing one line on it (recorded and sent by email). About the most unlikely musical collaboration I could ever have thought of.