The Rhythm Nation pop star, now 59, called on producer Steve Nicolaides to make the sensitive request, according to an excerpt The Hollywood Reporter published from Jeff Pearlman's Only God Can Judge Me: The Many Lives of Tupac Shakur, out Tuesday. You know, Tupac's reputation is that he's a cat about town, the Grammy winner reportedly said. And I don't want to swap saliva with him until I'm really sure that he's healthy and clean.