-As Spencer and Mona are talking about the PROM POSSIBLITIES, Aria looks very intrigued at what they are saying, while the other girls look confused or uninterested. Perhaps they were pitching the idea to her RIGHT THERE. I tried to grab a screen shot of her little tiny open mouth smirk that she does, but I couldn't it was so fast. If all that's not enough, when the girls look up at the camera, ARIA FREAKING SMILES at it. It's not a fake smile either. It is real.
