42: Chevrolet HHR
The PT Cruiser was a massive success for Chrysler in the 1990s, so why GM would wait six years to copy it is beyond comprehension. By the time the HHR hit the market, the appetite for these retro-inspired wagons was almost non-existent. The HHR was a carbon copy of the PT Cruiser in just about every way. It was almost pitiful how little effort GM put into it (via Car & Driver).
The HHR didn’t sell well at all, and it didn’t help that the economic recession was right around the corner. The HHR would not garner much interest in the automotive market, and the car was eventually discontinued. This is by far one of the most disappointing vehicles to come out of this era.