"FourFiveSeconds" is a song recorded by Barbadian singer Rihanna, American musician Kanye West and English musician/former Beatles member Paul McCartney. It was written and produced by West, McCartney, Mike Dean, Dave Longstreth and Noah Goldstein with an additional writing from Kirby Lauryen, Ty Dolla Sign, Dallas Austin and Elon Rutberg. Previewed by West at the iHeartMedia Music Summit on January 21, 2015, it was posted on Rihanna's official website on January 24. The same day the song was made available for digital download. "FourFiveSeconds" is a folk-pop, pop and soul pop song with an instrumentation consisting of an acoustic guitar, organ and bass guitar.

Upon its release, it peaked at number four on the US Billboard Hot 100 chart. In doing so it gave Rihanna her 26th top-ten song on the chart, while McCartney made a record by ending the longest break between top-ten singles on the chart. The song also peaked at number one on the US Billboard Hot R&B/Hip-Hop Songs chart. Internationally, "FourFiveSeconds" reached number one in Australia, Denmark, Ireland, Luxembourg, New Zealand and Sweden, as well as the top-three in Canada, France and the United Kingdom.

To promote the song, an accompanying black-and-white music video was directed by Dutch photographer duo Inez and Vinoodh in New York City. Rihanna, McCartney and West performed "FourFiveSeconds" for the first time at the 57th Annual Grammy Awards on February 8 held at the Staples Center in Los Angeles; the performance received highly positive reviews. The single has been covered by various recording artists, including Canadian rapper Drake and British singer-songwriter James Bay.

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