TV On the Radio architect David Sitek is adding Massive Attack to his production resume, collaborating with the trip-hop innovators on their long-awaited follow-up to 2003's '100th Window.' Sitek recalls that when he first met the band, at a Brixton show, he was a little nervous. "When we found out we were playing with them, I was like, 'How the f*** am I . . . 'cause it's obvious that I steal s**t," he tells Spinner. "I thought he was going to take my lunch money or something. Then to be asked to work on it I was like, 'Holy f***.' It's one of those things I don't even question."

While Sitek was intimitated by a band that's been incredibly influential for him, Massive Attack's Robert Del Naja was equally apprehensive. To that end, he recruited rapper Mos Def to break the ice. "Mos Def did a track with us from the stage," Del Naja recalls. "I was there with a CD in my pocket and Mos Def goes backstage [and says], 'These are my boys.' [I thought,] 'Well, in that case.' [I said] 'Here's a CD by the way -- not from Mos Def but from me.'"