The Weeknd is only a few dates deep into the North American leg of his Starboy: Legends Of The Fall Tour, and he's already bringing out the biggest of guests. Abel's performance at Inglewood, California's The Forum Saturday night featured a surprise appearance from none other than Kendrick Lamar.

Fresh off the release of his huge-selling and critically-acclaimed album DAMN., Kendrick joined Abel for a performance of Starboy collaboration "Sidewalks," as well as his own Mike WiLL-produced single, "HUMBLE." While Lamar could inspire excitement from any crowd at this point, the Compton native was given a particularly enthusiastic reception in Inglewood.

Check out some photos and footage from Kendrick's appearance and the rest of the show below. Find the remaining dates in The Weeknd's Starboy tour, which also features Rae Sremmurd, Belly, and 6LACK, here.