When was Duetos de leyenda created?

Please provide more context or information about "Duetos de Leyenda."

For example:

* What kind of work is it? Is it a song, album, play, movie, TV show, or something else?

* Who are the creators or performers? Knowing the artists or creators can help narrow down the search.

Once you provide more details, I can try to find the creation date for you.