I'm a big fan of Kate, but her Who Knows is ok, but for me no ones, not Kate, or Eva Cassidy, or Susanna Hoffs,or Judy Collins, or Kellie and Chris While, or Vikki Clayton, or anyone else can ever match Sandy singing it. Lets not forget the Unhalfbricking version wasn't even Sandy's first recording of it, but Martin Lamble's subtle drumming and Hutchings bass line counterpoint still remain with me. Now, virtually anything else Kate has done.....a definite highpoint for sure. I agree with Nick though, both excellent singers, etc.