The act, which started performing in the late 1950s and had been charting on the Billboard Hot 100 since 1967 with mostly folky ballads and midtempo pop numbers, turned in a disco tour de force with its songs for the soundtrack. The trio topped the chart with the ballad "How Deep Is Your Love," followed by the floor-filling No. 1s "Stayin' Alive" and "Night Fever."
But, history was made when another Bee Gees-written tune for Saturday Night Fever, Yvonne Elliman's rendition of "If I Can't Have You," hit No. 1 on May 13, 1978. In doing so, the album became the first soundtrack to score four No. 1 singles — a feat that no soundtrack has since replicated.
Released in late 1977, Saturday Night Fever — described by Billboard in a Nov. 12, 1977, review as having "something for everyone" and filled with "bundles of talent" — spent 24 straight weeks atop the Billboard 200 the following year, tied for the third-longest No. 1 reign by a soundtrack. The collection went on to win the Grammy for album of the year — the first film soundtrack and only disco album to do so — and stands as the second-biggest-selling soundtrack in U.S. history, with 16 million sold, according to RIAA.
As Billboard predicted: "Look for this album to take off."