Crosby, Stills & Nash was a folk rock supergroup made up of American singer-songwriters David Crosby and Stephen Stills, and English singer-songwriter Graham Nash. When joined by Canadian singer-songwriter Neil Young as a fourth member, they were called Crosby, Stills, Nash & Young.

Neil Percival Young is a Canadian and American singer and songwriter. After embarking on a music career in Winnipeg in the 1960s, Young moved to Los Angeles, joining the folk-rock group Buffalo Springfield.

Déjà Vu is the second studio album by the American folk rock group Crosby Stills Nash & Young, and their first as a quartet with the addition of Neil Young. It was released in March 1970 by Atlantic Records. It topped the pop album chart for one week and generated three Top 40 singles: "Woodstock", "Teach Your Children", and "Our House". It was re-released in 1977 and an expanded edition was released in 2021 to mark its fiftieth anniversary. In 2003, the album was ranked No. 148 on Rolling Stone magazine's list of the 500 greatest albums of all time, and later was ranked No. 220 on the 2020 edition of the list.[3] Certified 7× platinum by RIAA, the album's sales currently sit at over 8 million copies. It remains the highest-selling album of each member's career to date.[4]

Crosby, Stills & Nash was a folk rock supergroup made up of American singer-songwriters David Crosby and Stephen Stills, and English singer-songwriter Graham Nash. When joined by Canadian singer-songwriter Neil Young as a fourth member, they were called Crosby, Stills, Nash & Young. The Song "Ohio" was written to protest the Ohio National Guard shooting demonstrators at the Kent State University in Ohio.