Combs keyed up expectations as he told fans something special was on the way to help him close out an already-rousing festival set. Playing somewhat coy, he sang the first portion of "Friends in Low Places," only for Brooks to quietly appear on stage and take over.

The musician took his own turn popping up during another artist's performance when he joined Backstreet Boys for "I Want It That Way" later that night

The night before Combs took the stage, headlining artist Jelly Roll delivered a star-packed set with special guests ranging from MGK to Shaboozey to Wiz Khalifa to Lana Del Rey. Zach Bryan headlined Night One, bringing out Willow Avalon to sing Kacey Musgraves' part of "I Remember Everything" during his set.