Nostalgia is in and of itself an enduring beauty trend. We love taking something we did as kids, putting a modern twist on it, and calling it “vintage.” When oversized scrunchies and blinged-out bobby pins started popping up in Sephora, I was hardly surprised. Mod bobs and crimped ponytails on the ‘Gram? Nothing to bat an eyelash at. But when some of my favorite nail artists started recommending French manicure colors to their followers, I’ll admit I didn’t expect that wasn’t a throwback I expected.