Ok, does everyone else already know that there is a trend out there to show shirttails below your jacket?

I mean, I kinda just was watching a whole slew of fashionable women at a local fashion show last weekend, and they are wearing leather jackets and crop blazers with a longer, usually sheer/semi sheer, top underneath. I kept 'seeing' this again and again but it wasn't until this 'ah ha' moment that I figured out how that long top was intentional and not just an accident of wearing a short jacket. And it looks so chic (well to me it does).

Have I been missing this trend for years? Or maybe it isn't a trend, but a style? How do I apply this to my Hourglass body? Anyone else doing this or already pinning pages worth of inspirations like this? Any help appreciated.