While he's still most famous for his role as Steven Hyde in That '70s Show, actor Danny Masterson has been DJing since 1997, when he would hop on turntables at friends' house parties in Los Angeles using the moniker DJ Mom Jeans. "I guess my first big festival was Lollapalooza 2008," he tells Rolling Stone at this year's Lollapalooza, where he was a repeat performer. He reveals that DJ AM actually taught him how to mix records but, of course, we'd be remiss if we didn't also get him to open up about his current acting projects, including a new television series, Playing With Guns, that he's been hard at work on for Comedy Central.