Once you hear this "Head Like a Hole"/"Call Me Maybe" mashup, you can't unhear it. Not that you'd want to.
CRAZY FACT: Dave "Rave" Ogilvie, longtime producer of seminal industrial noisemakers Skinny Puppy and frequent Trent Reznor collaborator, did the instrumental mix for "Call Me Maybe." How's that for six degrees of separation?
As the resident Nine Inch Nails fan on the Alive staff, I declare this to be ... pretty awesome. If you're in the mood for more heavy-meets-pop mashups, here are a couple of favorites:
Korn vs. Taylor Swift:
And my all-time personal favorite, Slipknot vs. Justin Beiber. Seriously, this is just a good song.