I remember a radio interview years ago where I believe she said that her grandmother told her of her native American roots.  Now are you calling this grandmother a liar?  How do you know she is not correct?  Frankly I consider this a non issue.  If she is native American it is only a small percentage and she is obviously not living in a tribe so it is just not relevant.   I have German and Swedish roots.  So what.   I am not responsible for the Actions of Hitler or Erick the Red but I do enjoy an Octoberfest.  :-)