Back in December 2014, Kendrick Lamar appeared on one of the final episodes of The Colbert Report, and he took the opportunity to debut a new song that never even had a title. He still hasn’t released it. And last night, Kendrick was a guest on The Tonight Show, and he did pretty much the same thing. On last night’s show, he debuted a song that I guess is called “Untitled 2.” It’s a fluid, joyous, funky track, one that he performed with a live band, and it’s probably warm and hopeful enough that it would’ve been out of place on last year’s To Pimp A Butterfly, at least until it built to its cathartic, powerful conclusion. Maybe he’ll actually release this one, but I wouldn’t bet on it. Kendrick also sat with an interview with Fallon, and the two of them discussed how Kendrick is happy that he didn’t get more Grammy nominations than Thriller-era Michael Jackson. Fallon also played Kendrick a mash-up of his own “Swimming Pools (Drank)” with the Mario Kart theme music. Watch the interview and the performance below.

You ain’t gotta tell him that he’s the one.