I've always thought skinny girls look taller in photographs? Maybe I'm wrong. She looks positively frumpy in that photograph though. It irks me because she's got such a gorg bod and I feel that she should show it off.
I kind of like how her face is a little plain, it really offsets beautiful clothes (like that Vivienne Westwood shot, I adore that). But I kind of like her with the brown hair better, it suits her looks rather than trying to 'toughen her up' or whatever with the black crop.