Kendrick Lamar has surprise-released his new album “GNX,” featuring contributions from Jack Antonoff, SZA and Kamasi Washington.

The 12-track “GNX” is relatively light on features, with the exception of two tracks — “Luther” and “Gloria” — that feature SZA. The album includes “Heart Pt. 6,” the latest in his ongoing series that Drake used as the title for one of his diss tracks in the back-and-forth between the rappers earlier this year.

Rumors had been circulating for months that Lamar was hard at work on a new project. Earlier this week, DJ Snake suggested that Mustard had contributed to four or five of the songs, and that there was a surprise Taylor Swift appearance, though she doesn’t appear to make the project.

Lamar also makes reference to his controversial Super Bowl Halftime Show performance on the opening track “Wacced Out Murals,” a gig that many on the internet complained should have gone to Lil Wayne due to its taking place in his native New Orleans. “I used to bump ‘Tha Carter 3,’ I held my Rollie chain proud / Irony, I think my hard work let Lil Wayne down,” he raps. “Got the Super Bowl and Nas the only one congratulate me, all these n—s agitated, I’m just glad it’s on they faces”

“GNX” comes before the close of a massive year for Lamar. He made headlines in the spring for his feud with Drake, releasing a string of singles including “Euphoria,” “Meet the Grahams” and “Not Like Us,” the latter of which became the only song to make a significant impact on the charts. Earlier this month, it was announced that the song was nominated for song of the year and record of the year.