Why is Fluttershy the new frontpony for a literal Death Metal band? The answer probably won't surprise you if you saw Bats! Especially now that I basically told you what it is ahead of time.
It's for the EQD prompt this week for Filli Vanilli. It shares similar themes with Filli Vanilli, but doesn't really require you to have seen it. It probably does require you to have seen Bats! though.