By Sarah Khan

We thought we'd seen it all, from Gandalf the Grey singing Gandalf Style, this amazing mother and son dancing duo and the dangerously catchy Call Me Gangnam Style!

Now, just in time for Halloween, we're pumped to see "Gangnam Style" meet the theme from GHOSTBUSTERS!

Watch the amazing mash up below and just try to get through the rest of the month without having it stuck in your head!