Another woman I wouldn't call a "rocker" (more of the disco era) with incredible pipes - Amii Stewart, who never became particularly famous, but she could belt it out with the best of them. I remember years ago watching American Idol and thinking most of the contestants were pretty good. Then one day, driving down the highway, this song came on, and it amazed how much more talented this girl on the radio was compared to those competing on American Idol for a million dollars and a contract...yet, she had a really short career (as far as I know). Anyway, listen to her hit controlled high notes at around 2:35 or so. That ain't human