Chelsea Houska is going full spandex while baby #4 keeps cooking in the oven. The "Teen Mom 2" star, who confirmed her pregnancy in August, just uploaded a mega batch of Instagram stories for her 5.9 million followers, with the style haul footage showing the MTV face's stunning blossoming bump. Chelsea, 29, is already a mom to Aubree, Watson, and Layne, with baby number 4 confirmed as being a girl. The Lauribelles partner tried on endless looks today, but she stuck to one item almost throughout. Check it out below.