I'm afraid I must disagree. The breasts do hike up when you raise your arms above your head, because the pectoralis major has an attachment to the humerus. The breast sits on top of the pectoralis major, the serratus anterior and the rectus abdominis; and where those muscles move, the breast follows. The upward lift is further accentuated by the way she has arched her back.
The breasts do not start on the back. However, one of the other muscles involved where the breasts attach is the serratus anterior which does insert to the inside surface of the scapula.
The torso may be slightly lengthened, which is common in art. But it is not lengthened to the extent to accommodate six additional pair of ribs.
The hair is not held up by hairspray, but is pulled back into a pony tail on the top back part of the skull. Women have much more hair and hair density than men.
The sculptor in question is the venerable Tom Meier. Art often does not replicate human anatomy 100%. We like symmetry, the individual human body is not symmetrical. I do orthopedic bodywork and massage.
You may find the sculpt to be "awful." That's ok, it's art.