We've had a couple of submissions here at Everypony Sings that take a song from the show and switch it into a minor key, which makes for some very interesting (and creepy!) new music.
Today, we have a version of Making Cupcakes in D minor from PerspectiveZero. I really enjoyed the instrumentation on this one—it sounds like something from Phantom of the Opera.
Thanks for sharing, PerspectiveZero!