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This is an Oct. 1970 photo of rock singer Janis Joplin. (AP Photo) ( JANIS JOPLIN )

This is a 1969 photo of rock singer Janis Joplin. (AP Photo) ( JANIS JOPLIN )

Rock-folk singer Janis Joplin performs with her group in Dec. 1969 at an unknown location. (AP Photo) ( JANIS JOPLIN GROUP )

Rock singer Janis Joplin performs in this undated photo, location unknown. (AP Photo) ( JANIS JOPLIN )

Rock singer Janis Joplin, 26, shows a victory sign as she leaves police headquarters with her attorney, Herbert Goldburg, in Tampa, Fla., on Nov. 20, 1969. Joplin had a preliminary hearing on obscenity charges lodged against her when she allegedly cursed a police who interupted a performance. (AP Photo) ( JOPLIN VICTORY SIGN )

21st April 1969: American blues rock singer Janis Joplin (1943 - 1970). (Photo by Stroud/Express/Getty Images) ( 97f/14/huty/6747/35 )

This is a 1970 photo of rock singer Janis Joplin. (AP Photo) ( JANIS JOPLIN )

* ADVANCE FOR WEEKEND EDITIONS, JUNE 16-19 **In this photo provided by Fenton Communications from Feb. 11, 1969, taken by photographer David Fenton, Janis Joplin performs at the Fillmore East in New York. In a newly released compilation, "Shots: An American Photographer's Journey 1967-1972," Fenton's photos depict the protests, politics and personalities of this turbulent era with a keen eye for detail and a naive fearlessness that comes only with youth. (AP Photo/David Fenton) ( 1960S PHOTOGRAPHER )

American singer Janis Joplin (1943 - 1970) closes her eyes and cradles a microphone while performing, c. 1967. (Photo by Tucker Ransom/Getty Images) ( T546521_01 )