I believe it was an attempt to match the quirky style of the clothing. I really like it, actually. Everything is very cartoon-ish and bold. There's mismatching with the shoes and the strange, still posturing of the hands of most of the models- The clothes aren't even what they appear to be (i.e. a thick canvas skirt that is in reality, a singular layer that stays in place, but "looks like" a lighter pleated skirt that would have a lot of movement. I think of it like paper dolls; If everything else is interchangeable, why not the models' heads as well?