There is one costume that is flying off the shelves this year and it all began on the cover of 'Vanity Fair.'

FOX News Radio's Michelle Pollino reports:

What do Caitlyn Jenner and Elsa from 'Frozen' have in common? Well they were duking it out for the top Halloween costume and unfortunately for Elsa...

(Frozen) "Let it go... Let it go..."

She had to 'Let It Go'...

TMZ reporting several costume companies say the replica of Caitlyn's corset, worn for her 'Vanity Fair' cover, is hands down the the most in-demand Halloween costume this season.

A representative for Wholesale Halloween Costumes says they haven't seen a craze like this since 'Frozen' last year.

Michelle Pollino, FOX News Radio.