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Double-bubble Abarth

8. Double-bubble roof

To be honest, we're not all in agreement on this one. Done properly, a double-bubble roof is a thing of beauty, giving a car a subtly rounded silhouette that screams "retro" and "futuristic" in one voluptuous breath. Done improperly, it looks like the most bootylicious of plumbers has gotten stuck doing a handstand on your floorboard.

15 styling cues for the ages gallery

What are these timeless styling cues, these elements that designers love to flaunt? We took an unofficial poll of the The Car Connection staff to come up with our own 15 faves.