"It wasn't really forced, it wasn't gimmicky ... it's sort of an accident if you will," he said. "There's something magical in that melody and in the beat and in the production ... and people in Russia and Australia and U.K. and France and U.S. and South America -- everyone's just dancing."
"Despacito" is the first mostly Spanish song to top the Hot 100 since Los del Rio's "Macarena" in 1996. The smooth jam about slowly falling in love has become a pop culture phenomenon since its release in January, selling more than 7.7 million tracks -- based on digital sales, audio streaming and video streaming -- according to Nielsen Music. It has spent 27 weeks at No. 1 on Billboard's Latin songs charts, and while some believe Justin Bieber helped make the song a hit when he jumped on its remix, it's quite the opposite.
"Technically, the reason why Justin Bieber discovered the song was because it was so popular already," said Rocio Guerra, Spotify's head of Latin culture.
"Despacito" had reached the Top 40 on the Hot 100, and following the Bieber remix -- which includes the pop star singing in Spanish -- the song reached No. 1. The remix spent 14 weeks on top of Spotify's global chart until last week when it was supplanted by J Balvin's "Mi Gente" -- another Spanish song finding success on U.S. radio and the pop charts.
"Mi Gente," a collaboration with Willy Williams, is No. 30 on the Hot 100 after just a month on the chart.
"I don't think this is just something that happened overnight ... it's something the Latin music industry and creative community, we've been working so long toward this direction, and I don't think specifically only in the U.S., it's a global momentum," Guerra said. "Platforms like Spotify are giving access to the same songs at the same time everywhere, so that's allowing us to have more [Latin] artists on the [global] chart."
"There has been a domino effect," added Guerra, who said there are currently eight Latin songs on Spotify's global chart, which includes 50 songs. "The more songs that we put on the global chart, people are getting more used to listening to songs in a different language."
She said that Spotify has spent the last two years pushing Latin music in regions outside Latin America: "We're proactively trying to push its consumption in countries like Germany, Italy, Switzerland, the U.K. [and] obviously the U.S."
And there's proof it is working. Daddy Yankee became the first Latin artist to reach No. 1 on Spotify in June, taking the spot from Ed Sheeran, and the Latin genre is third overall globally on Spotify, just behind pop and hip-hop.
The Latin beat can be heard on current English-language hits as well, including DJ Khaled and Rihanna's "Wild Thoughts," which samples Carlos Santana's 1999 megahit "Maria, Maria," and French Montana's "Unforgettable," which has a reggaeton vibe (J Balvin appears on its Latin remix).
Fonsi said he doesn't want to take credit for the success of Latin music on pop radio, but knows "Despacito" has helped set the mood.
"I hope that it's a door that will stay open for a long time. I think it's bigger than just this summer. I think it was [over]due for Latin music to get this attention and I love the fact that we're all collaborating in different languages," he said. "It's not about where you're from or what language you're singing in, it's about bringing cultures together and different styles, and it's good for music in general."
Erika Ender, who co-wrote "Despacito" with Fonsi at his home in September 2015, said the song felt special when they created it.
"There are some songs that come with a special spark, and I think it's got it. ... We looked at each other and said, 'I think this is a hit,'" she recalled.
Ender also credits the song's success with Fonsi's decision to get out of his comfort zone.
"People used to see him like a [balladeer] or a pop singer, and he went out of his way to bring something new to the audience," she said.