<P> During the summer of 1979, the Bee Gees embarked on their largest concert tour covering the US and Canada . The Spirits Having Flown tour capitalised on Bee Gees fever that was sweeping the nation, with sold out concerts in 38 cities . The Bee Gees produced a video for the title track "Too Much Heaven", directed by Miami - based filmmaker Martin Pitts and produced by Charles Allen . With this video, Pitts and Allen began a long association with the brothers . </P> <P> The Bee Gees even had a country hit in 1979 with "Rest Your Love on Me", the flip side of their pop hit "Too Much Heaven", which made Top 40 on the country charts . It was also a 1981 hit for Conway Twitty topping the country music charts . </P> <P> The Bee Gees' overwhelming success rose and fell with the disco bubble . By the end of 1979, disco was rapidly declining in popularity, and the backlash against disco put the Bee Gees' American career in a tailspin . Radio stations around the US began promoting "Bee Gee - Free Weekends". Following their remarkable run from 1975 to 1979, the act would have only one more Top 10 single in the US, and that would not come until 1989 . </P> <P> Barry Gibb considered the success of the Saturday Night Fever soundtrack both a blessing and a curse: </P>

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