Taylor Swift also changed into a red dress upon her "initiation." She stood beside Beyonce, who was also wearing a red dress.
Interestingly, Hillary (Duff) had another big red dress event, this one tied to Laura Bush.
The names probably don't refer to one person. They are characters, or roles, or mind control alter-egos or whatever you want to call them.
Wendy, the Little Good Witch.