I'm in London at the moment and went to the National Portrait Gallery yesterday to check out the exhibition on Twiggy in celebration of her 60th birthday (practically a national holiday here). There were lots of photographs I'd seen already, of course, but a few I had not and many I had only ever seen in black and white. It's definitely worth checking out if you're in the UK.
I also found this while digging around Google Images. Why don't they sell these anymore?!