Funk legends Earth, Wind & Fire were one of the highlights of this weekend's Bonnaroo Festival in Tennesse, playing for near 90 minutes and bringing rap superstars Kendrick Lamar and Chance the Rapper out to join them onstage.
The festival is known for its unexpected collaborations, but it seems that this one surprised even Chance and Kendrick, who were simply watching the band from the side of the stage, before being invited onstage to freestyle.
Watch the full set below, Kendrick and Chance appear around the 1:15:00 mark.
