Kendrick Lamar celebrated the No. 1 debut of his album To Pimp a Butterfly by shutting down the streets of L.A. for a mobile concert. The Compton rapper, in partnership with Reebok’s #GetPumped initiative, rode through his hometown on Tuesday night while performing on top of a moving sixteen-wheeler flatbed truck.

Just an hour before, he told his L.A. fans to meet him at two locations at 9 p.m. and 9:30 p.m. Dressed in a gray sweatsuit, Kendrick made his way down Sunset Blvd., ending at the Reebok Lounge on Melrose Ave.

“Reebok and I have a shared goal to inspire, so helping people to get pumped though music and fitness was perfect—performing in such a unique way, creating a real experience and encouraging people through a run in my hometown of L.A.,” said Kendrick in a statement. “Partnering with Reebok, we always want to do something different and that will get people moving and this is an example of us coming together to create something special.”

[rap-up-photo id=”210589″]

Fans mobbed the streets and ran alongside the truck as he and his band performed hits including “Money Trees,” “m.A.A.d city,” “Backseat Freestyle,” and “Fuckin’ Problems,” plus a cover of Tupac’s “Hail Mary.” After prompting from his diehards, he also performed “Alright” off TPAB for the first time.

Fans took to Twitter to share their excitement about K-Dot’s surprise concert.