'Saturday Night Fever' (1978)
It's okay to think that disco sucks, but there's something different, and dare we say special, about the Bee Gees-and-beyond soundtrack to John Badham's love letter to leisure suits (which we named the fifth best soundtrack of all-time). Perhaps it's a catching the zeitgeist at just the right moment, as the film — which features genre staples like "Stayin' Alive" and The Trammps' "Disco Inferno"— was released precisely as the musical movement was hitting its tipping point. As a time capsule, this look at Seventies' club culture and dance-floor fads is invaluable; as a drama about outer-borough nobodies trying to make it in the big city, however, it leaves a lot to be desired. Still, the double-album behemoth proved popular enough that it would take 15 years to be supplanted (by Whitney Houston and The Bodyguard) as the best-selling soundtrack of all time.