Last night, John Mayer announced via Twitter that he was playing a secret concert at the Village Underground at 3 am for only 10 dollars. But the surprises didn't stop there! After his concert, he stopped and sang "Billie Jean" with a fan outside the bar.-

Warning: It's sort of a lot of falsetto.

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Disclaimer: We have no particular reason to believe this man is homeless--that's just what the youtube page said, so we're going with it.

Moral Of The Story: You never know what you might see on a 5 am stroll in New York City.

(Go HERE for a cool account of the actual concert, which will make even the biggest haters soften a little towards John Mayer)