Crosby, Stills, Nash, & Young: Woodstock (1970)

Joni Mitchell wrote "Woodstock" based on Graham Nash's descriptions of the event. Mitchell's version came out in 1969 while Crosby, Stills, Nash, and Young released a version in 1970. Later, Led Zeppelin incorporated part of the song into their live version of "Dazed and Confused."

CSNY:
http://www.youtube.com/watch?v=HKdsRWhyH30



Joni Mitchell:

http://www.youtube.com/watch?v=cRjQCvfcXn0