Can-Can chic never really got off the ground as some expected with the release of Moulin Rouge in the early 2000's, but people have been dressing as the Saloon Girl for ages before that on Halloween. I can imagine the allure is surely the fun of wearing a LOT of makeup, feathers in your hair, and of course, the one socially acceptable excuse to lift your skirt over your head over and over again throughout the evening.
Trina is wearing a (perhaps unnecessarily full) double-plus circle skirt (I wanted to play with fold and waves, but it came out a little too wavy), with a halter top that gathers into the choker neckband with pleats, and a cropped faux double-breasted bolero with invisible shoulder pads. See how complicated and impressive I made it sound?
