So embedding has been disabled for the clip of this famous CSN song (why do people do that?), but you can just double click the video to open up in a new window.
Here's a little info from Wikipedia on this great track from CSN's debut album:
"Suite: Judy Blue Eyes" is a suite of short songs written by Stephen Stills and performed by Crosby, Stills and Nash. It appeared on the group's self-titled debut album in 1969. It was also released as a single (edited and in mono), going to #21 on the Billboard Pop Singles chart. The song is ranked #418 on Rolling Stone's list of the 500 Greatest Songs of All Time.
The group has performed this song many times, most famously at the Woodstock and Live Aid festivals. The title may be a play on words for "Sweet Judy Blue Eyes"; also, the song may be considered a suite in the classical music sense (i.e., an ordered set of musical pieces, usually four in number)...."
Read on at the entry above to hear the story of how the group found their third member, Graham Nash (formerly of The Hollies).
You can also hear a great studio instrumental of Suite Judy Blue Eyes here.
Note: do not interrupt the groove.