No one will ever forget the line, "Yo Quiero Taco Bell." One of the most memorable ad campaigns involving a dog has to be the Taco Bell Chihuahua. The tiny pup commanded a presence commercial after commercial for the fast-food chain that is unforgettable. The Chihuahua was actually played by Gidget, a 12-pound pup who was ready to become a star. But whatever happened to the famous pup?