Jimmy Fallon & Luis Fonsi Sing 'Despacito' With New Lyrics To See If It's Still Catchy: Watch

Andrew Lipovsky/NBC
Luis Fonsi on The Tonight Show Starring Jimmy Fallon on Jan. 30, 2019.

Luis Fonsi's "Despacito" was the undeniably infectious song of 2017, but Jimmy Fallon wondered what the tune would be like if the sultry Spanish lyrics were replaced with random words.

Fonsi dropped by The Tonight Show, and the duo put the song to the test, replacing the slow "despacito" that introduces the chorus with odes to "Flaming Hot Cheeto" and Jared Leto. In their final duet, Fallon and the crooner take on a rendition dedicated to itty bitty swimwear. "Tiny Speedo/Old man tanning in a tiny Speedo/I think he needs to be way more discrete-o/This whole beach can see his little pepito/Tiny Speedo," they sing to a cheering audience.  

The Tonight Show Starring Jimmy Fallon airs weeknights at 11:35 p.m. EST on NBC. Fonsi talks and performs on Wednesday evening’s (Jan. 30) episode. SNL star Kenan Thompson also appears. Watch the "Despacito" clip below.