She may have mistaken this for costume party, judging by the fact that she came as the Basilisk.
The neckline, the high-slit, the cleave—all great on their own, but a touch OTT when slammed together in this heinous crime of a dress.
She surely brought a present to the shindig—Herself.
When you aren't a truck, but your outfit makes you one.
EVERY 12 YEAR OLD IN THE WORLD CALLED! They want their outfit back.