I have always admired her style and hair, throughout her career, and even more so now that she is older. Would you say her hair is naturally curly/wavy? It seems so, and is somewhat similar to mine, except mine is a frizzy mess 
I also would love to know how she gets the smoother, straighter look. It isn't overly fussy or styled like a lot of contemporary curls, so advice is thin on the ground.
I love the colour too. She has a certain style that I would just generally call 'theatre' or maybe slightly arty/boho, but I would say has a very classic, laid back look.
Any ideas where an admirer of her style might shop if she was on a somewhat smaller budget? A few pics of the wonderful hair attached!