Released in late 2022 as part of Romeo Santos’ album Formula, Vol. 3 , "El Pañuelo" is a fusion of and Flamenco influences.

: A viral moment occurred when Rosalía joined Santos to perform a duet of "Obsesión," the classic hit from his former group, Aventura .

: The track blends Santos’ signature urban bachata with Rosalía's experimental vocal techniques and flamenco roots.