Jim Morrison
Poet and lead singer for the Doors, died at 27 from heart failure, possibly alcohol or drug related. Billed along with Janis Joplin and Jimi Hendrix as members of the "27 Club", who all died at age 27 in 1970 or 1971 (Rolling Stones guitarist Brian Jones, who died in 1969 at that age, is also often mentioned as a member).