That's probably my second favorite shot of him. I only say "second favorite" because my favorite is still the first picture I ever took of him.
Did you see him when Manson was touring with Cooper or afterwards when Manson was doing his own tour? Twiggy has worn this dress 3 out of the 5 times we've seen Manson in the past year and a half---the first time he had a mini skirt dress. He was wearing it during the Manson/Cooper show, but a few days later when we saw Manson during his solo tour Twiggy had switched to a mini skirt dress.