She's dressed up as a chocolate chip cookie for Halloween and just cut out holes around her chocolate chipples for the chocolate chip part of her costume!
Those sunglasses with the bars that wanna-be thugs/ scene kids wear.
The bars add nothing to the actual glasses other than giving the wearer a so called sense of style or originality.
also maybe worn with a Swag Rag.
The shades them selves come in many different color and styles some with bars and no lenses which defeat the purpose of wearing sunglasses to begin with.