The “Bad Guy” singer stole the show in a see-thru sweater vest, layered atop a crisp white button-up top and a black necktie ...

Of course, certain styles have changed a bit, so consider these preppy picks to be perfect for a modern-day Gossip Girl ... how Nate Archibald preferred to dress in blue nautical-themed outfits?

Plaid skirts, loafers, and polo shirts are trending TheImageDirect.com; Amazon Preppy clothes ... is actually a dress. Wear it with gold hoops and chunky loafers for an easy day-to-night ...