This past Tuesday, on March 24, Reebok and Kendrick Lamar brought the streets of West Hollywood to a standstill with a unique live event, one that fused fitness and music. Hundreds of unsuspecting runners, outfitted in Reebok's new ZPump Fusion shoe, were participating in the brand's #GETPUMPED campaign. Their run through the streets of Los Angeles was suddenly provided with a live soundtrack, courtesy of Kendrick, who performed an impromptu set on the back of a custom flatbed truck. The Top Dawg Entertainment artist and Grammy award winner treated runners and onlookers to previously unperformed music from his record breaking new album, To Pimp A Butterfly. We've already seen the photo recap from the event; now, check out the official video.