4. “How Deep Is Your Love”
By: Bee Gees
Hot 100 Peak: No. 1 for three weeks (1977)
Barry, Robin and Maurice Gibb that made up the Bee Gees hadn’t even seen the script for the movie that eventually became “Saturday Night Fever” when they wrote this song for the soundtrack. They didn’t even know if there was a love scene in the film. The song was meant for Yvonne Elliman, but their manager Robert Stigwood persisted that they record it themselves.