Rappers Kendrick Lamar and Chance The Rapper made a surprise performance with Earth Wind and Fire on Friday night.
The two MCs joined the band onstage and spit freestyles during the second night of the Bonnaroo Music Festival.
As soon as the collaboration began, Kendrick's Top Dawg Entertainment label-mate SZA posted video of the performance as many fans did the same.
kendrick lamar and chance the rapper join earth, wind and fire on stage at bonnaroo pic.twitter.com/NXZzGmmg7g— illroots 4 the kids (@illroots) June 13, 2015
And shortly after, Chance took to Twitter to provide fans the back-story of how the collaboration came to be.
So I'm just minding my own business camping at @Bonnaroo— Chance The Rapper (@chancetherapper) June 13, 2015
Watch the full surprise performance below (1:15:00):