Knowledge is Power, most of the time.

"WAIT!" I shouted. Stone Julie lowered her arm. "Uh," I stalled, trying to think of some way to get out of this, "You can't possibly expect to go out like that and not draw attention to yourself! I mean, if you want to destroy the human race, you have to be a bit stealth about it. Look at what you're wearing. Not only is it victorian, but everyone knows that Julie doesn't dress like that. They'll know something is wrong in a second. And those white eyes and dancing hair, what is the deal? I'll help you out." Thats the ticket, I should have bought a little bit of time. "And Chad, he's gonna die like that." I glanced over to the gurgling Chad on the ground, saliva dripping down his puffy face, unable to be reached by his massive, stubby arms.
"Chad will be fine, I am sure of this. His mind is much too important right now to waste. Now you will explain to me how I can go out into public without drawing notice." The monotone voice of Stone Julie commanded.
"Um, okay." I stammered. "Well, first you need to be dressed like Julie, that outfit is just too strange." Hopefully she might cast the stone away when she changes shirts. Stone Julie closed her eyes and her clothes rearanged to exactly what Julie was wearing before. Unfortunatly, the stone was still embedded in her chest. I continued:
"Alright, looking good. Now you need some sunglasses for those eyes, and something for that creepy hair." Once again, Stone Julie closed her eyes. Thin sunglassses appeared on her face, and her hair formed up into a bun, eliminating the free-moving hair. Well, I'd have to say it looked exactly like Julie, but with a stone in her chest, new sunglasses, and a hair style you wouldn't find her dead in. I need something to draw attention to us, though. What could I trick her into changing that will make everyone know something is wrong...