http://www.bbc.co.uk/news/entertainment-arts-19312310 Way before the vast majority of you guy's time (even before mine!), but I always like this song. Seemed to epitomize the counter-culture, "hippie" movement of the late 1960s. If I had a time machine and could experience any era that would be it. I don't think any generation has had that defining of a movement that impacted society so much for so long. Think it would be very cool to have seen it in person.
http://www.youtube.com/watch?v=5XLn93OfYGo