<P> "Science Fiction / Double Feature" is the opening song to the original 1973 musical stage production, The Rocky Horror Show as well as its 1975 film counterpart The Rocky Horror Picture Show, book, music and lyrics by Richard O'Brien, musical arrangements by Richard Hartley . The song is reprised at the end of the show, with lyrics that reflect on the final events of the story . </P> <P> The song is a tribute to and sendup of various B movies and serials parodied in the show itself . </P> <P> The film opens with a title sequence of a disembodied mouth (inspired by the surreal Man Ray painting A l'heure de l'observatoire, les Amoureux (Observatory Time, the Lovers)) against a black background singing in homage to classic science fiction films . It was sung by Richard O'Brien and lip synced, as the now - iconic pair of red lips, by co-star Patricia Quinn . In its original incarnation, The Rocky Horror Show, the song was performed by the character Magenta doubling as the credited role of "Usherette". This character took on the unofficial names of "Miss Strawberry Time", "Trixie" and the "Belasco Popcorn Girl" from props carried on stage during the number . For the filming of the opening sequence, Quinn's head had to be strapped to a board to keep it stationary for filming . </P> <P> The song is made up of fragments from 1950s subgenre horror and science fiction films and likened to that of avant - garde artist Tristan Tzara by author Vera Dika in her book, Recycled Culture in Contemporary Art and Film . Tzara would construct poems by taking snippets of words from newspapers and placing them into a bag to randomly draw from and arrange . Instead, the words in "Science Fiction / Double Feature" are purposely made to rhyme with a set structure and set with phrases that create cohesion . </P>

Who sings the opening song of rocky horror