Contest: Guess My Costume!

Hey lovelies!

I'm having a little contest here at Lovely Undergrad!  Beginning today and once a day from here on out, I'll be releasing a clue to what my Halloween costume is going to be this year.  To enter, you'll just submit a comment. 

Don't worry if you're comment doesn't show up!  Comments won't show up until I approve them.  And I won't approve them until the very last day of the contest, so you can all keep guessing away!  When I announce the answer, I'll reveal all the comments and the winner.

Now for the clues!

Clue #1
She had two evil sisters.