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.
Were the Blues Brothers popular?
The Blues Brothers took off with the public as a legitimate musical act. They performed live gigs and released the album Briefcase Full of Blues in 1978.
Did the album Briefcase Full of Blues win any awards?
The Briefcase Full of Blues album reached number one on the Billboard 200 and went double platinum. It is among the highest-selling blues albums of all time.

Question: how many albums were put out
Self-contained rewrite: How many albums did the Blues Brothers put out?