Carrie Fisher died Tuesday morning ... days after suffering a massive heart attack on board a flight from London to LAX ... a family spokesperson has confirmed. Fisher died Tuesday morning ... days after suffering the heart attack. People on the plane performed CPR on Carrie and once the flight landed, paramedics rushed her to UCLA Medical Center on Friday. Carrie had been on a publicity tour for her new book, "The Princess Diarist." The book recently made headlines because she wrote about having an affair with co-star Harrison Ford while shooting the original 'Star Wars' movies. Of course, Princess...