They've clearly taken some autotuning liberties on some of these vocals, but the result is pretty incredible.
Although I'm sure this took hours upon hours of programming locations into these drones, the fact that these little guys are playing music so in-sync is very, very impressive. and a little scary.
Elsa singing Michael Jackson's Thriller and the main characters from Frozen dancing like Thriller zombies? Sure, why not.
This gives it a very different feeling than the original, but is still great. I first heard this song as performed by The White Stripes, which is heavier but also excellent.
Here's a live version at normal speed.
I can't say this is perfect, but it is surprising how well these two very different songs go together.
The look they give each other as he starts playing is the CUTEST!
And here's a gif of Obama dropping the mic at the end - I don't know why I think that's so funny: