The two surprised Chicago concertgoers when they popped up onstage and danced to the singer's hit "Uptown Girl"

By Jodi Guglielmi
August 28, 2015 09:25 AM
Myrna M. Suarez/Getty

BFFs Jennifer Lawrence and Amy Schumer just took their friendship to the next level: piano-dancing buddies!

The comedian, 34, and Hunger Games actress, 25, joined Billy Joel onstage during his Chicago concert on Thursday – and in true Lawrence-Schumer form, the ladies made it quite a show to remember.

They climbed on top of Joel’s piano and danced to his hit song “Uptown Girl” – a tune that was prominently featured in Schumer’s comedy hit Trainwreck.

“Billy came out for his encore and started singing ‘Uptown Girl,’ ” a concertgoer told PEOPLE. “And then Amy and [Jennifer] came out with some others for the song! Eventually Amy and [Jennifer] were dancing on Billy’s piano. Absolutely loved it.”

Naturally, the crowd went wild as soon as the two stars hit the stage.

“So I was just at the billy Joel concert and in the middle of a song JENNIFER LAWRENCE AND AMY SCHUMER RANDOMLY WALKED ONSTAGE omg asdfghjkl,” Tweeted another fan from the crowd.

At one point, Lawrence even literally kissed Schumer’s feet.

As it turns out, vacation pals Schumer and Lawrence – who announced Wednesday that they are cowriting a screenplay – actually spent all day preparing for their big moment onstage: They rehearsed with Joel at Wrigley Field hours before the concert.

Schumer later took to Instagram to remember the epic night, posting a video as well as a snapshot with the caption “Piano men.”

Schumer has been spotted around town since arriving in Chicago earlier this week for a scheduled comedy show. She also made a surprise appearance at a Talib Kweli concert on Wednesday and joined the rapper for a rendition of Kanye West‘s “Get ‘Em High.”

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