Jesus Christ, doesn't anyone google anymore :
CadZZilla at the Longhorn Hot Rod Show in 2005
http://en.wikipedia.org/wiki/ZZ_Top
Based on a 1948 Cadillac Series 62 Sedanette, the CadZZilla is a low-slung, sleek and dark custom car built by Boyd Coddington and designed by Larry Erickson. The name is a portmanteau of Cadillac, ZZ Top and Godzilla. It wasn't featured as prominently in ZZ Top's videos as "The Eliminator", but it appeared in "My Head's in Mississippi" and in "Burger Man" pulling out of the parking lot of a diner at the very beginning of the video. When CadZZilla has left the frame, it reveals a brief view of 'The Eliminator' parked beside the diner. An artist's rendition of CadZZilla was used on the cover of the Recycler album. In the video for "Doubleback", which uses Back to the Future Part III footage, CadZZilla appears at the final showdown and similarly to the early Eliminator videos, three sexy women get out of the car and solve the problem. When the car drives off, a view of its rear license plate is shown: "I8TOKYO" I ate Tokyo, a reference to Godzilla.