As 40th birthdays go, Jimmy Fallon's was pretty great - not the least of which, he had Stevie Wonder show up and play 'Happy Birthday'.
Not only that, Seth Rogen and James Franco turned up and got twelve kinds of naked with a birthday cake for Jimmy Fallon.
Which is cool, we guess, if you're into James Franco being naked. You can check his Instagram for that kind of thing, though.
Anyways, here's the video. You just know Seth Rogen is capable of being a decent stripper.