I do remember from the article her friend stating that she has an amazing memory for details and facts. There were other comments that highly suggested she is Si-dom. I can see ISFJ as a possibility, but she generally strikes me as a Thinking type. I think ISTJ with strong tert-Fi.
Oh wait...here we go (google people! google!). I'll start you with the first page, and then you can pull up the rest from this gallery: Your #1 Source for Jennifer Aniston Source Photos - Elle - September 2009
First page: Your #1 Source for Jennifer Aniston Source Photos: Click image to close this window