From the moment Elvis first swiveled his hips lasciviously in front of a TV camera, rock & roll stars have understood the value of shock. And the art form founded on horrifying parents and thumbing its nose at the establishment still find ways to defy our expectations. Sometimes it's an artistic transformation, sometimes a personal revelation, sometimes it's just unfathomably odd behavior, but it seems rockers will do anything to shake things up, grab a headline or two and jar us out of our jaded stupor. Here are some of rock's biggest surprises . . . you could have knocked us over with a feather.

Surprise #10