Mary Bridget Davies does an interpretation of which famous American rock singer and songwriter who died of a heroin overdose at age 27?
Mary Bridget Davies: Mary Bridget Davies (born August 30, 1978) is an American singer and actress. Mary Bridget Davies:  She performs with her own band, "The Mary Bridget Davies Group", and is also an interpreter of Janis Joplin's music. Janis Joplin:  After releasing three albums, she died of a heroin overdose at age 27.
Janis Joplin