"Work" is a song recorded by Barbadian singer Rihanna for her eighth studio album, Anti, featuring Canadian rapper Drake. The song was released as the lead single on January 27, 2016, through Westbury Road and Roc Nation. The song was written by PartyNextDoor, Rihanna, Drake, Monte Moir, Rupert "Sevn" Thomas, Allen Ritter, and Matthew Samuels, and was produced by Boi-1da, Seven Thomas, Ritter, Kuk Harrell, and Noah "40" Shebib. The dancehall, reggae-pop, and R&B song, contains an interpolation of "If You Were Here Tonight" performed by Alexander O'Neal. Lyrically, the song incorporates themes of working for money, as well as discussing fragile relationships. The song is in the Jamaican Patois language and three of its writer-producers: Rupert "Seven" Thomas, Matthew "Boi-1da" Samuels, and Jahron "PartyNextDoor" Brathwaite, are Jamaican-Canadians.

Critical response to "Work" was mixed upon release; critics praised its composition and Rihanna's decision to return to her earlier themes of dancehall music, while others were more skeptical of the song's potential as a comeback for the singer. Critical opinion improved over time; the song was included on several year-end lists and nominated for two awards at the 59th Grammy Awards: Record of the Year and Best Pop Duo/Group Performance. The song reached number one on the United States' Billboard Hot 100 chart, becoming Rihanna's fourteenth number-one single and making her the act with the fourth-most number-one songs on the chart. The song remained at the top for nine weeks. The song also peaked at number one in nine additional countries and is certified Platinum or higher in thirteen countries, including 7x Platinum in the US and Diamond in France.

The song was accompanied by two music videos, which both premiered on February 22, 2016. The first of the two versions was directed by Rihanna's previous collaborator Director X, while the second was directed by Tim Erem. The song was further promoted with live performances at the 2016 BRIT Awards which featured guest appearances from Drake and SZA, the 2016 MTV Video Music Awards, as well as being performed on the Anti World Tour. "Work" became the first dancehall song to top the Billboard Hot 100 since Sean Paul's "Temperature" and was succeeded three weeks later by another dancehall song, Drake's "One Dance".