Amy Schumer & Jennifer Lawrence Hijack Billy Joel's Concert With a Piano-Top Can-Can (VIDEO)

We don't know whose idea this was and we don't know how much alcohol was involved, but we do know for sure that JLaw and ASchu (no? Just trying it out) climbed onto Billy's piano -- presumably with his permission -- and boogeyed down to "Uptown Girls." They did the twist AND the can-can, so presumably this was at least somewhat thought out. Also, they rehearsed it.

A video posted by Jennifer Lawrence (@jennishrader) on Aug 27, 2015 at 7:18pm PDT

You can't watch the whole thing, but here are several different angles. This first one is my personal favorite because Jennifer takes the time to lick Amy's foot. I don't know why either.

A video posted by @kyledunnigan1 on Aug 27, 2015 at 9:50pm PDT

A video posted by @caramelodies on Aug 27, 2015 at 9:44pm PDT

Here's that can-can I was talking about:

A video posted by @caramelodies on Aug 27, 2015 at 11:42pm PDT

The other people up there with them are Kim Caramele (Amy's sister -- imagine) and Kyle Dunnigan, a writer on Inside Amy Schumer. 

No one really knows why this all happened or at what point Amy Schumer and Billy Joel became such great friends, but it presumably has something to do with the song's role in Trainwreck. If you don't understand what I'm talking about, then you should see Trainwreck immediately to see Amy's coordinated dance routine to "Uptown Girl" in its entirety. It's wonderful.

Or not. This is fine for now:

 

Image via jennishrader/Instagram