I was surprised to see an almost anonymous [sic] Ann Wilson vote also. I love her, don't get me wrong, but had it been more Stevie Nicks answers, I wouldn't have been as surprised. Side discussion, which one still has the pipes? I know my girl Pat has lost some range, sorry to say.
Ann Wilson's rendition of Stairway to Heaven wasn't all that long ago and her voice was still awesome then. Not quite what she was 20-30 years ago, but then pretty much no one is.
It can be tricky to keep your pipes healthy enough to keep performing at a high level over a long period of time.