LL Cool J Walk of Fame
Terence Patrick for Variety
January 21, 2016 | 10:00AM PT

Andrew Barker

Senior Features Writer @barkerrant

Every musical genre needs a ground zero. It may not be its exact point of origin, but it’s the time and place at which all of the possibilities and future branches seem to coalesce, with the following decades left to add footnotes. Rock and roll has Sun Studio in Memphis. Punk rock has CBGB. And for hip-hop, though the genre might have its official birthplace at Kool Herc’s 1520 Sedgwick Ave., its commercial watershed can be traced to the NYU dorm room of Rick Rubin, where in 1984 the enterprising young producer, his business partner Russell Simmons and a teenage Queens rapper named LL Cool J fully launched Def Jam Recordings.

Following the 1985 release of the Platinum-selling “Radio,” LL’s debut and Def Jam’s first full-length pressing, Rubin would go on to produce for acts as varied as Slayer, the Beastie Boys, the Dixie Chicks, Metallica and Adele. Simmons would develop a vast, multifaceted empire that established the gold standard for hip-hop entrepreneurship. And LL would release seven more Platinum albums, star in several films and long-running TV shows, win a pair of Grammys and will receive a star on the Hollywood Walk of Fame on Jan. 21.

Now 48, LL still remembers Rubin’s old phone number and the address of his college dorm room. He got them from the back cover of T La Rock’s “It’s Yours,” the Rubin-produced 1984 single, which was the first recording to sonically capture the rough-edged, beat-heavy primacy of NYC street rap onto record. “Radio” went one step further, stripping hip-hop of the last vestiges of its disco roots. With nothing but a beat and LL’s inimitably charismatic delivery, it launched the 17-year-old as the genre’s first crossover sex symbol and bona fide pop star, his Kangol hat becoming just as distinctive a fashion accessory as Run-DMC’s Adidas.