Top retro celebrity costumes for this Halloween?

My wife has a vintage clothing store & is trying to identify what the trends are going to be this year as far as people dressing up in retro/vintage costume to dress as characters from recent movies, tv shows, etc.. I know the 50s/60s mod stuff is going to be big because of AMC's Madmen show.. if you have any insight into other popular costumes based on recent movies, tv shows, etc, we'd appreciate your feedback.