Kendrick Lamar performs a new track, “Untitled 2,” on The Tonight Show

Last year, Kendrick Lamar performed a completely new and (as of that point) unreleased song on The Colbert Report following the release of our No. 1 album of the year, To Pimp A Butterfly. And last night, he went on the Tonight Show and did it all again. Introduced by host Jimmy Fallon as “Untitled 2,” the song, like most of the material on his most recent record, is an almost stream-of-consciousness verbal deluge spat over a laid-back, horn-inflected jazz arrangement.