When Torrence is washing the cars and the the guy with the camera films her, you can see that her hair is wet. Then when Cliff drives up and the camera goes back to her, her hair is completely dry and crimped. I wonder how that could have happened. I didn't see a blow dryer or a crimper there.
Maybe her hair is naturally crimped. And also, it could have been a long time later when Cliff came. It wasn't necessarily right after they filmed Torrence with wet hair.
They could have done that over several days or the weekend so the part thats taped could have been like the first day and then when he comes it could be like the second