Kozmic Blues was performed by Janis Joplin as part of which iconic festival set?
Kozmic Blues:  It was a part of Joplin's set at Woodstock Festival in 1969. Janis Joplin: Janis Lyn Joplin ( ; January 19, 1943 – October 4, 1970) was an American rock singer and songwriter.
Woodstock