A hefty 28 years separates beat legend DJ Premier and 17-year-old New York rapper Joey Bada$$, yet their debut collaboration Unorthodox doesn’t show it. Ever since Guru passed away in 2010, Premo has been keeping tremendously busy, with rumours of a full album with Nas, Immortal Technique and Pete Rock all in the works for 2013. It’s great to see Rolling Stone’s Greatest Hip-Hop Producer of All Time (whose discography includes Big L, Big Daddy Kane, Jay-Z, Kanye West, KRS-One, Mos Def, Rakim, Snoop Dogg, The Notorious B.I.G. and Busta Rhymes) working with, arguably, a legend of the future. Their collab comes via Mountain Dew’s Green Label Sound record label, which is releasing a free download of the track starting Monday, January 14th. In the meantime, you can listen to a radio stream below and a video of the collab with Joey and Premo.