Nas told Billboard last week he was cooking up a few surprises, and now we know one of them: an as-yet-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, tells 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."

In addition to its regular incarnation, the album may also be released in a special edition exclusively through Best Buy or Target. A portion of the proceeds will go toward building a school in Africa, though details are still being solidified.

As previously reported, Nas guests on a song on Dr. Dre's long-in-the-works "Detox" album, due sometime this year. He was nominated for two Grammys at Sunday's 51st annual awards but lost in both the best rap solo performance and best rap album categories.

Source: Billboard Magazine