We were lucky enough to work with Will, and that kid is a...

We were lucky enough to work with Will, and that kid is a monster. He just came in, spit his verses and then got to work on the beat. And the whole time, we were like, 'Wow, we can't believe this is happening!' We're fans of the Black Eyed Peas for a long time, and we always wanted to do a collaboration with them.