When we meet Justin Long’s actor character AJ in the new thriller “Barbarian,” he’s a Hollywood lad on the make, a guy with a TV pilot about to be picked up sporting down the coast with the top down in a vintage Alfa Romeo Spider not too many years removed from the model Dustin Hoffman drove in “The Graduate.”

Apt.

A giddy AJ is singing along to the car’s sound system. And what’s that patter song he’s singing along to?

Why, a tune that was new at the same time the car was.