Conversation so far:
Who started the Blues Brothers?
Dan Aykroyd was a close friend of John Belushi. According to Aykroyd, it was their first meeting that helped spark the Blues Brothers act.
When did Dan Aykroyd start the Blues Brothers?
The Blues Brothers are an American blues and soul revivalist band founded in 1978 by comedians Dan Aykroyd and John Belushi as part of a sketch on Saturday Night Live.

Question: were the Blue Brothers popular?
Self-contained rewrite: Were the Blues Brothers popular?