"Look What You Made Me Do" is a song recorded by American singer-songwriter Taylor Swift. It is the first single from her sixth studio album, Reputation. The song was released on August 25, 2017, along with the pre-order of the album. The song uses the rhythm of the 1991 song "I'm Too Sexy" by Right Said Fred. Because of this, the songwriters of that song are credited. This song is the first single released by Swift in almost a year, since "I Don't Wanna Live Forever" with British singer Zayn Malik in 2016.
In the US, the song became Swift's fifth chart-topper when it jumped from number 77 to number one in its second week on the Billboard Hot 100. The song entered at the top of the charts in Canada, Australia, and the UK, becoming Swift's first UK number-one hit. It was also number one in Spain and New Zealand.
The RIAA certified the song triple-platinum for shipments of three million copies across the US.