Who would be more of a diva than, Lady Wooz? Lady Wooz is the fashion teacher at wooz high. In the interview,Lady Wooz seemed as if she was TRYING to ignore the question. Now,another reason I think it could've been lady wooz is because she said that GoodOldWooz destroyed her dress. That makes sense,because maybe she took his time-traveling device to go back into time and get back her dress!
However,in the story..the time-traveling device was destroyed. So,Lady Wooz couldn't have took his time-traveling device to fix it. Unless she used help from Professor Preztige.