Leif Garrett pleaded not guilty Wednesday to charges of heroin possession (as well as subway-fare evasion, but who can pass judgment on that, really?). The former teen idol's mother, Carolyn Stellar, claims her son is addicted: "He needs rehab. This is a disease," she tells the New York Daily News and blames the hard-partying rocker lifestyle. "Leif idolized rock stars... that whole life of rock 'n' roll and drugs... the Rolling Stones. He figured if they could do it, so could he." Similarly, actor Brad Renfro (Ghost World) has entered a not-guilty plea to charges of attempted possession of heroin and is due back in court on Feb. 23.