Cellardoor: In my opinion, I think when she first started out, her style was an instinctive thing and now, as she's getting older and magazines have pegged her as a 'fashion icon' she puts pressure on herself to look good, and half the time, she misses. Or, we could just be expecting too much of her!
I disagree with that actually, Sienna has never put pressure on herself to look good and I doubt she's started now. I think she was MORE under pressure to look good back then because she was just starting out and everyone was watching her. Now I think she just doesn't care. I go through those sort of times too more of than not, where I'm just dressing comfortably for myself and can't be bothered to be inventive. But really I highly doubt Sienna has ever wore something cos she was 'pressured'. She's not that kind of person at all.