And as I research for a picture to link you to, I see that this is hardly a new thing. I shouldn't be surprised, fashion is predictably cyclical. But, aside from seeing it mentioned last year, apparently, the kids used to do it a lot in the 50s. Cardigan backward, tweed skirt. Sounds nice. Here's a link to an interesting article about the trend's recent upswing. And here's the Tumblr post that originally piqued my interest.
On me: Dress Xhiliration by Target (old); Cardigan Old Navy; Necklace Le Chateau (old); Shoes Franco Sarto via some show discount place in LA... VERY old)