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Chance The Rapper Surprised Fans With Kendrick Lamar, AGAIN: Watch

Kendrick, Chance, and Donnie Trumpet joined forces at TIP Festival.

Apparently once just wasn't enough.

After bringing out Kendrick Lamar during his set at Bonnaroo, Chance the Rapper surprised fans, once again, at his own Teens In the Park (TIP) Festival in Chicago today (June 24).

The festival, open only to Chicago residents 13-24-years-old, went down at Northerly Island today. Chance joined headliner Donnie Trumpet onstage, and the duo performed parts of their recent collaborative album, Surf. In an even bigger surprise, Kendrick appeared out of nowhere to deliver "m.A.A.d city" and "i," and fans went absolutely bonkers. Those lucky, lucky kids.

Check out some footage and pics of Kendrick, Chance, and Donnie joining forces.