Janis Joplin
"Pearl" (Vinyl)

The last album that Joplin (nearly) completed before she died is considered to be her finest.
There was an era in the 60's when capturing many artists' music on record was quite a feat since much of the performers' magic came while they were live on stage. Putting everything in a studio made their music often feel artificial.
(See: Led Zeppelin's "How the West Was Won" and compare their live versions to many of their studio counterparts.)

Still, it seems care was taken to try and capture Janis' stylings and talents as she was.