Stephen Stills singing a slightly rearranged version of Mitchell's lyrics which put the line, "we are billion year old carbon" — which only appeared in her final chorus — into each of the first three choruses. Then that line was replaced with "we are caught in the devil's bargain" in the last chorus, which was also in Mitchell's final chorus. "Woodstock" was one of the few Déjà Vu tracks where Crosby, Stills, Nash, and Young all performed their parts in the same session. Later the original lead vocal by Stephen Stills was partly replaced with a later vocal recorded by Stills, who recalled: "I replaced one and a half verses that were excruciatingly out of tune." Neil Young disagreed, saying that "the track was magic. Then later on [Crosby, Stills & Nash] were in the studio nitpicking [with the result that] Stephen erased the vocal and put another one on that wasn't nearly as good." The Crosby, Stills, Nash & Young version of "Woodstock" peaked at #11 on the Billboard Hot 100 in May 1970 and #3 in Canada. A different recording of "Woodstock" by Crosby, Stills, Nash & Young was played under the closing credits of the documentary film Woodstock released March 1970. Personnel David Crosby – harmony vocals, rhythm guitar Stephen Stills – lead vocals, organ Graham Nash – harmony vocals, electric piano Neil Young – harmony vocals, guitars Additional musicians Greg Reeves – bass guitar Dallas Taylor – drums Matthews Southern Comfort "Woodstock" became an international hit in 1970 and 1971 through a recording by Matthews Southern Comfort. The group performed "Woodstock" on the Live in Concert program broadcast live by BBC Radio 1 on 28 June 1970 – frontman Iain Matthews would recall that the group required an additional song for their set on the scheduled radio session, and that the choice of "Woodstock" was his own suggestion, Matthews having just become familiar with the Joni Mitchell version as he had purchased her Ladies of the Canyon album earlier that week. Due to the positive response to that song, the BBC contacted Matthews's label, Uni Records. According to Matthews, the label "had no idea what the [BBC] were talking about and contacted my management, who asked me about it. Uni suggested that we record the song and add it to the newly recorded Matthews Southern Comfort album, Later That Same Year. I declined to mess with