<P> "Look What You Made Me Do" is performed in the key of A minor with a tempo of 128 beats per minute . Swift's vocals span from G to F . </P> <P> Critic Brittany Spanos of Rolling Stone noted a "nightmarish aesthetic" present in the song, and believed it to be a continuation of the "antagonistic persona" from "Bad Blood". </P> <P> Richard Fairbrass, Fred Fairbrass and Rob Manzoli, the members of the British dance - pop group Right Said Fred, are credited as songwriters because the song interpolates the melody of their song "I'm Too Sexy". According to Fred Fairbrass, he and his brother were contacted one week before the release of "Look What You Made Me Do" and were asked whether a "big, contemporary female artist who hasn't released anything for a while"--whose identity they were not told--would be able to use a portion of their song for her latest single . Although the brothers agreed to a deal, they did not officially find out that the artist in question was Swift until the morning after the song was released, but had deduced that it was her based on the description they were given . Both of the Fairbrass brothers said that they enjoyed "Look What You Made Me Do"; Fred Fairbrass told Rolling Stone, "I like the cynical aspect of the lyric, because' I'm Too Sexy' is a cynical song, and I think she channeled that quite well ." A representative for Swift confirmed that the song interpolated the melody from "I'm Too Sexy", but did not include sampled audio from the earlier song . </P> <P> "Look What You Made Me Do" received polarized reviews from critics . USA Today said that the polarizing reaction to the song illustrated Swift's position as a "ubiquitous cultural force". The Telegraph Randy Lewis praised the song, deeming Swift and Antonoff's work as "blow (ing) past the production clichés of clap tracks and hiccuped syllabic hooks that have proliferated across Top 40 fare in recent years with boldly inventive textures and fresh melodic, rhythmic and sonic accents". He also added how the track musically and sonically shifted alongside the lyrics . Sarah Carson of the Los Angeles Times wrote a positive review of the song, saying: "The reverberating crescendo builds and ever more delicious is the wickedness of Swift's menacing protagonist", praising Swift for her successful embrace of the villain character the media has portrayed her as previous to the song's release . Variety's Chris Willman also praised Swift's embrace of a darker - styled pop music and the stylistic conflict between the song's pre-chorus and chorus . Mark Harris, in New York magazine's pop culture blog, thought of Swift's song as a pop art anthem for the Trump era in how she reappropriates her public feuds as empowering badges of honor without acknowledging her own responsibility or blame . </P>

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