<P> According to the DVD commentary for Saturday Night Fever, the producers intended to use the song "Lowdown" by Boz Scaggs in the rehearsal scene between Tony and Annette in the dance studio, and choreographed their dance moves to the song . However, representatives for Scaggs' label, Columbia Records, refused to grant legal clearance for it, as they wanted to pursue another disco movie project, which never materialized . Composer David Shire, who scored the film, had to in turn write a song to match the dance steps demonstrated in the scene and eliminate the need for future legal hassles . However, this track does not appear on the movie's soundtrack . </P> <P> The song "K - Jee" was used during the dance contest with the Puerto Rican couple that competed against Tony and Stephanie . Some VHS cassettes used a more traditional Latin - style song instead . The DVD restores the original recording . </P> <P> The album has been added to the National Recording Registry in the Library of Congress . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table>

Who played tony's brother in saturday night fever