Jessica Simpson always seems to have her open mouth. Sometimes it employs it to speak about its boobs, or to provide the deaf-mute fair lines in still more deaf-mute films, but more of time its mouth is simply open any hour.
There could is a scientific explanation. When you rub something close to the mouth of a baby of the eruptions of a reflex inside and their mouth opens to await a nipple thus they can eat. Apparently the reflex of food of Jessica is on overwork. She had gone back much to types recently, thus it is possible she has a cramp which prevents its mouth of closing.