For example, the Fall/Winter 2008 collection is heavily influenced by the flapper look of the roaring 1920s, while the Spring/Summer 2006 Collection is more Three's Company meets the water.
Flapper style prom dresses in black, red or gold look especially authentic.
Again, the changes were not drastic in and of themselves - they certainly could not compare with the outlandish flapper dresses that women sported - but they were certainly easy to distinguish from previous years' styles.
Most of the video is Carrie and other women dancing, first in 20's era Flapper dresses and later in corsets and stockings.
As fashions changed hat pins became unnecessary and by the 1920s the flapper style made them totally useless.