Watch Jennifer Lawrence and Amy Schumer Cut a Rug on Billy Joel’s Piano

“Uptown Girl” made them lose their minds.

Jennifer Lawrence and Amy Schumer are in the height of their : they vacationed together, they’re writing a screenplay together, and, apparently, they go to concerts together. On Thursday night, during a Billy Joel performance at Wrigley Field, the two actresses surprised the crowd by dancing to “Uptown Girl” with wild abandon…on top of Joel’s actual piano. (This is, after all, the summer of surprise celebrity guests at major stadium concerts.) Watch Lawrence and Schumer cut a rug, below:

Photos by Instagram