Saturday Night Fever
Saturday Night Fever has one of the best movie soundtracks of all time. It was released in 1977 and is almost entirely composed of Bee Gees songs. The Bee Gees songs were used so extensively in the soundtrack and film that they effectively lost an album's worth of material.
This monster of an album went 16x Platinum, spent 24 weeks at the top of the Billboard 200, and was on the charts for a total of 120 weeks. The popularity of the album can be attributed to three factors: it is a double album, so sales are counted twice, the movie was fantastic, and the Bee Gees were at the pinnacle of their career at the time. The Library of Congress added this album to the National Recording Registry in 2013 because it is culturally significant. It won the Grammy for Album of the Year, as well as five other awards, including the Hall of Fame Award.