I can't really top that, so I'll throw in my favorite cover of a song by an artist who my wife and I have seen live on a number of occasions. This clip has 14 million views now so I'm sure others here are aware of him.
I once found (and linked here) to the craziest sound--I still think it was insane, in a weirdly fascinating way.
A full-on orchestral set, but Japanese, with traditional instruments front and center, and an operatic singer performing "Smoke on the Water" (by Deep Purple).