Stephen Stills wrote "Suite: Judy Blue Eyes" for ex-girlfriend Judy Collins. She does have strikingly blue eyes. First off is Stephen's demo version.
The song is on the self-titled Crosby, Stills & Nash debut album issued in 1969 and was one of the tunes they sang at Woodstock. The single which was considerably shorter that this album version hit the top thirty. Yes that's Spanish you hear toward the end of the tune.