Yup, that would be "Keep On Keepin' On" off of "Absolute Power". It's definitely not recent, but it names Eminem, along with some other artists he respects. I'm not doubting he can "facilitate personal contact" with Em, either directly or indirectly, but they've never really worked together. I would call "The Anthem" a remix, and a damn good one at that. One of my favorite videos of all time.