We ran into Skrillex in front of The Record Plant in Hollywood, where the legendary DJ informed us that he was on his way in to lay down some tracks with Justin Bieber.

Sources tell us that Chris Brown is also in the studio with Justin, and it looks like to us and our sources that Skrillex was coming into to do some urgent, last-minute production. Skrillex kept it vague about CB, but he definitely confirmed that he’s working with the Biebs.

Walking in at 9:30 at night, he even brought his own personal red, plastic Solo cup with “coffee” to fuel his emergency recording session. We’re not sure what prompted this late-night stand-by, so it’s a good thing Skrillex is pumped up on his caffeine overload to get him through the recording session.