it was on American Masters last night. Wow, what a great show, some great footage, great insight into a pretty tortured soul. She was just an amazing singer and was able to emote that power in her songs. If you get a chance to see it it is well worth the 2 hours of time. Narrated by Cat Power who does a very good job as well, you almost think it's Janis speaking. Pretty cool to see the members of Big Brother, Kozmic Blues and Full Tilt, also cool to see Kris Kristopherson talk about Bobbi McGee song.
https://www.yahoo.com/tv/janis-joplin-pbs-little-girl-blue-171302320.html