It is in fashion these days to have "bed head", and gone are the days when you must straighten your hair to go to the grocery store. And we are used to seeing models with 10 pounds of makeup, especially natalia. She probably only wears some foundation and mascara and gloss on her own time, and we are not used to seeing her this way. I go out with bed head all the time, my hair is not "dirty" i just didnt waste my time to style it and i think it looks kinda cool. If u just brush wavy hair, it will turn into a frizzy mess. Like mine..