Nas told Billboard last week he was cooking up a few surprises, and now we know one of them: an untitled collaboration with reggae star Damian Marley.

The pair has been recording quietly in Los Angeles for the last several weeks. Nas' manager, Anthony Saleh, told Billboard the project will most likely be released in the spring. It's not clear which label will release it; Nas is signed to Def Jam, while Marley records for Universal.

"We've been recording in a studio, where people like Mick Jagger are recording. No one knew who we were," Saleh says. "We're going to Miami this week to finish it up and we're aiming to tour for the album this summer."