I don't know if Nancy will appear though. 
If she could obtain a cloak of invisibility to wear to such events, I believe that she would.
Of course in my fantasies, she would go the opposite route and try to flaunt herself instead. Like maybe following the Christmas tree's unveiling, she rips off all of her clothes, hugs the tree trunk and wraps her breasts around the tree trunk and yells, "Look everyone! My tits have grown so big I can do this!!"