Watch Kendrick Lamar Play Air Harp and Nail the Performance of His Explosive New Song, ‘Untitled 2,’ on Jimmy Fallon’s Tonight Show


Questlove was right to be excited about the new Kendrick, which premiered on Thursday's Tonight Show. Dubbed "Untitled 2," the song unfurls as one long slow-burn of a crescendo, infused with the rapper's physical and lyrical showmanship we've come to know and love — similar, in some respects, to the "Untitled" number that hit The Colbert Report. (Jimmy Fallon's reaction is also appropriate.)