Offstaging = Competition. Some do it naturally, others do it because they can't afford to stay out of the game.
Dressing up is something all women do, following trends is more selected, but even then one doesn't need to follow every trend there is, unless you can't think of a wardrobe to yourself. There's certain clothings that can go on timeless, and quite a few women know that, which is why they don't stick out much, but are never out of fashion.
tl;dr Trends suck, regular clothing on beautiful women are win.