After seeing the Lockheed P-38 Lightning-inspired tailfins on the 1948 Cadillac, Exner adopted fins as a central element of his vehicle designs. He believed in the aerodynamic benefits of the fins, and even used wind tunnel testing at the University of Michigan—but he also liked their visual effects on the car. Exner lowered the roofline and made the cars sleeker, smoother, and more aggressive. In 1955, Chrysler introduced "The New 100-Million Dollar Look". With a long hood and short deck, the wedgelike designs of the Chrysler 300 letter series and revised 1957 models suddenly brought the company to the forefront of design, with Ford and General Motors quickly working to catch up. The 1957 Plymouths were advertised with the slogan, "Suddenly, it's 1960!" In 1958, Chrysler's Forward Look was the sponsor of the groundbreaking "An Evening with Fred Astaire" TV special.