The track is the lead single from the forthcoming 'Shady XV' compilation
The track was used to promote prime minister John Key's re-election bid
Rubin challenges Frank Ocean, Owen Wilson and Vincent Gallo
Two-disc collection set for November 28 release
Duo performed together at Detroit show
Three-hour gig at Los Angeles' Rose Bowl saw Rihanna and Eminem perform solo and joint sets
The track is believed to have been recorded between 1988 and 1991
Beyoncé leads the pack with eight nominations
Detroit rapper played second record-breaking show to 80,000 fans
Rapper plays first of two massive British shows