Karma.

Or, in the case of dresses, it's post-modern, vintage styles from What Goes Around Comes Around.

Peony Pristine is a cream linen sundress that takes you back to your little girlish days (which these days, was probably yesterday) with its jumper shape, apron pockets with checkered print, and wooden beads. The grosgrain ribbon detail on the straps and pockets will remind you of tying your hair in pigtails (I recommend refraining from that now, though).

The dress is fully lined and falls 30". Yes, it's made of summery linen, which is why it's on sale at Active Endeavors for $126, down from a whopping $420.