Out at a super-duper Parisian party for Jeff Koons' collab with H&M last night, French model babe Marie-Ange Casta came up with a way of looking cool on a cozy flex (which is all we're striving for right now). Contrary to popular belief, it turns out you can don a chunky, snuggly knit for a night out and not look like you're on a one-way ticket to slumpsville. Here's how: tuck your poppin' knit into the waistband of a classic pair of blue kick flare jeans (instant '70s kudos) to diminish the bulk factor, then finish with fr-fresh natural hair and makeup à la Marie.

Click here for a slick party styling trick from Miranda Kerr and Lily Aldridge.

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