It's Smile Time

This is a dance group in Paris called "La Preuve," which means "The Proof" or just "Proof." It consists of two girls (woot!) and two guys. Yes, they really are moving that fast. And where the heck are they?! At the end the camera pans and they appear to be in some crowded royal hall or something. But these dancers are just about the best I've ever, ever seen. Ever.
Update: My mother pointed out they were in a church.