"Night Fever" is a disco song, written and performed by the Bee Gees. It first appeared on the soundtrack to Saturday Night Fever. Producer Robert Stigwood wanted to call the film Saturday Night, but singer Robin Gibb expressed hesitation at the title. Stigwood liked the title Night Fever, but was wary of marketing a movie with that name. He combined the two suggestions and the idea for Saturday Night Fever as a motion picture was born.
"Night Fever" remained the number one Billboard Hot 100 single for over two months in 1978. It also replaced Andy Gibb's "Love Is Thicker Than Water" at number one, and was in turn replaced by Yvonne Elliman's "If I Can't Have You" - all of which were written and produced by the Gibb brothers.