by Mike Krumboltz Princess Diana was well known for her bold sense of style. Among her most talked-about looks was a black dress that she wore out on the town at the tender age of 19, just after she became engaged to Prince Charles. The dress caused a bit of a stir back in the day, due to its " racy " nature. Of course, "racy" is a relative term these days. Regardless, so famous was the black gown that it recently fetched more than $275,000,