Viral Video: Amy Schumer, Jennifer Lawrence dance on Billy Joel's piano

Billy Joel's fans went wild when Jennifer Lawrence and Amy Schumer made a surprising cameo at his concert at Wrigley Field (US) on Thursday night.

The pair who are writing a movie together, got up onstage with a group of friends, dancing to Joel's hit song Uptown Girl. Ofcourse the highlight, was when Lawrence and Schumer climbed on top of the piano and performed the twist.

It hasn't been clear what prompted the occurrence, but here's hoping the song maybe featured in their film.

Watch: Amy Schumer, Jennifer Lawrence dance to Uptown Girl