UPDATE // DECEMBER 21:
Watch The Weeknd's entire Vevo Presents concert:
EARLIER // DECEMBER 18:
The Weeknd surprised his star boys and girls at his Vevo Presents concert with an on-stage collaboration with Kendrick Lamar.
You don't say, say, say. The energy went from 10 to 20 when Lamar walked on stage to spit his verse on "Sidewalks" off The Weeknd's No. 1 charting album Starboy. As he fired away, Tesfaye started pacing the stage with a fiery angst, throwing out jabs to the crowd the entire time.
“He’s a genius,” The Weeknd previously told Beats 1 of Lamar. “He probably came in the afternoon and left late at night. He did it there on the spot. He played the record over and over. I played him songs, the ‘Starboy’ theme, of course, which he incorporated into his verse. He would just walk around, we had food, and he’s writing his verse in his head. He’d go to his phone, look at it a few, put it back in, start walking around. He then at one point went into the studio booth, closed the door, and I could hear him yelling his verse.”