My hair was this long, a few months ago. I could never get this sort of long, articulated waves. Instead, my hair would overreact and form big fat loose curls. So when I cut twenty inches off, I discovered (behold!) that my hair was actually genuinely curly, the entire time, and the only reason it looked straight was the amount of weight!
It's not like Leighton Meester is SN, it's about the look. I think it's really nice for SN lady - a bit sensual (it seems that the coat is worn on the naked body, with slightly unconstructed cut, defined waist, natural makeup and loose hair, the bag adds some brightness and texture. Simple, but vivid and classy