 The Official Eminem Box Set, a career-spanning, 10-disc vinyl box set, was released on March 12, 2015. The set includes seven of Eminem's eight studio albums (excluding Infinite), the 8 Mile soundtrack, the compilation Eminem Presents: The Re-Up, and the greatest hits collection Curtain Call: The Hits. Early in the year, it was announced that he would appear on Tech N9ne's "Speedom (Worldwide Choppers 2)". The song, also featuring Krizz Kaliko, was released on April 20. Eminem also appeared on Yelawolf's "Best Friend", the single from Love Story.
