Question: What 1974 television special was a prequel to a 1978 television animated special, in which the 1978 special used the vocal talents of one of the members of "The Blues Brothers"
Sentence (from "Dan Aykroyd"): A musical sketch he performed with John Belushi on "SNL", The Blues Brothers, turned into an actual performing band and then a highly successful 1980 film, also called "The Blues Brothers".
Relevant evidence: Yes