"Radiohead called us up because there were planning a big show in Oxford," says South Park co-honcho Matt Stone. "The venue was called South Park, so we made up some T-shirts for them. Then they brought up that they wanted to do voices for the show. I asked them, 'Are you sure you want to sully your well-deserved artistic reputation by associating yourselves with our crappy little show?' And they said, 'Sure.'" All five Heads recorded their South Park lines before a recent concert in Santa Barbara, California. "When you do voice-overs," says Stone, "you need to overact and overemote to make it work. It was funny to sit in a studio with Thom Yorke, a brilliant performer who opens his heart night after night, and say, 'Yo, Thom. Put some emotion into it.' I felt like a real shithead."
This story is from the August 16th, 2001 issue of Rolling Stone.