Conversation so far:
Who wrote the screenplay for The Blues Brothers film?
Dan Aykroyd
When was the film The Blues Brothers released?
06/20/1980
What music stars made an appearance in the film The Blues Brothers?
The Blues Brothers features musical numbers by singers James Brown, Cab Calloway, Aretha Franklin, Ray Charles, and John Lee Hooker.

Question: What kind of music was used in the film?
Self-contained rewrite: What kind of music was used in the film The Blues Brothers?