Amy and Jennifer joined the legendary Billy Joel on stage during his Chicago concert...but they didn't just do a chill sidestep on stage. Nope, they hopped up on Billy's piano and looked like they were having the time of their lives.
Jenn even kissed Amy's feet while climbing up to do their barefoot piano dance during Billy's performance of "Uptown Girl."
Jenn and Amy aren't just hanging out these days - they're also joining forces professionally, writing a comedy together. We can't wait to see what they come up with.
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Gallery | Jennifer Lawrence's Funniest Faces