The 39-year-old musician says despite being a Spanish singer, he finds the words in the song difficult and the episode is a matter in the past, reported Rolling Stone.
"That chorus is not easy to sing, even for fluent Spanish singers like myself. It's got a lot of lyrics, it's kind of tongue-twisty," says Fonsi.
The Puerto Rican singer adds Bieber's involvement in the Spanish song has put the Latin music on world map.