No, not Lena Dunham's boyfriend, the other one. According to the track list, Nate Ruess landed a feature on Eminem's upcoming album, The Marshall Mathers LP 2, out November 5. We should also probably mention that Rihanna and Kendrick Lamar are on the album (Skylar Grey, as well, if that's your thing). But yeah, that fun. guy sure stays busy.