[In this December 1969 file photo, singer Janis Joplin performs with her group Big Brother and the Holding Company.]
Typically, when anyone refers to "The Summer of Love" 50 years ago they're usually thinking of a soundtrack that represents the shift in popular music from "rock n' roll" to "rock." The Beatles, in 1967, brought "Sgt. Pepper's Lonely Hearts Club Band," which is still one of the most acclaimed albums ever made.
Rock fans also got some of the first albums by The Doors, The Who, Jimi Hendrix, Pink Floyd, Cream, The Velvet Underground, The Grateful Dead and Big Brother and The Holding Company.