"Hello, do you like my new design? Now that I've decided not to kill and/or torture you anymore, I decided to try to do other things with you. First, I don't know if you've seen it, since everyone involved has been dead for who knows how long, but have you ever seen the movie Spider-Man?"
GlaDOS: See, I have utalised my body fat to make me look better, ha ha.
Though it could just be the metal bands on the arms.