Déjà Vu (Crosby, Stills, Nash & Young album)

Déjà Vu is the second studio album by American folk rock group Crosby, Stills & Nash, and their first as a quartet with Neil Young. Released on March 11, 1970, by Atlantic Records, it topped the Billboard 200 chart for one week and generated three US 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 50th 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. 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.

The album was recorded between July 1969 and January 1970 at Wally Heider's Studio C in San Francisco, and Wally Heider's Studio 3 in Hollywood. It was produced by all four members of the band. Stephen Stills estimates that the album took around 800 hours of studio time to record; this figure may be exaggerated, even though the individual tracks display meticulous attention to detail. The songs, except for "Woodstock," "Almost Cut my Hair," and "Helpless," were recorded as individual sessions by each member, with each contributing whatever was needed that could be agreed upon. Young appears on only half of the tracks, with Nash stating he "generally recorded his tracks alone in Los Angeles then brought them back to the recording studio to put our voices on, then took it away to mix it".