"Despacito" (American Spanish: [despa'sito]; English: "Slowly") is a single by Puerto Rican pop artist Luis Fonsi featuring Puerto Rican rapper Daddy Yankee from the former's upcoming studio album. On January 13, 2017, Universal Music Latin released "Despacito" and its music video, which shows both artists performing the song in the La Perla neighborhood of Old San Juan, Puerto Rico and the local bar La Factoría. The song was written by Luis Fonsi and Erika Ender, with additional writing by Daddy Yankee, and was produced by Andrés Torres and Mauricio Rengifo.

It is a reggaeton-pop song composed in common time with lyrics about having a sexual relationship, performed in a smooth and romantic way. Commercially, the song topped the charts of 37 countries and reached the top 10 of 12 others, making it both Fonsi and Daddy Yankee's most successful single. It became the first song primarily in Spanish to top the Billboard Hot 100 since "Macarena" (Bayside Boys Mix) in 1996. The official video for "Despacito" on YouTube received its one billionth view on April 20, 2017 after 97 days, becoming the second-fastest video on the site to reach the milestone behind Adele's "Hello".

Several remix versions were released following the single's success. On March 17, 2017, both a solo pop version and a salsa version featuring Puerto Rican musician Victor Manuelle were released. On April 17, 2017, a remix version featuring Canadian singer Justin Bieber was released; this version helped to improve the song's chart performance in numerous countries, particularly in the English-speaking world. On May 5, 2017, both an electronic version produced by American trio Major Lazer and Colombian DJ MOSKA and an urban version produced by Sky were released.

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