Performed with additional background vocals by Torres, "Quien" was produced by Arjona with longtime collaborators Dan Warner and Lee Levin under their stage name Los Gringos, and was recorded between several studios in Miami and Mexico City.

Its accompanying music video, directed by Simon Brand, was filmed in Las Vegas, and features Arjona singing while walking around the city's nighttime lights.

A "jewel of elegance", according to Mexican website Terra, the music video has received 1.3 million views on YouTube.

In a press conference held in November 2007, Arjona stated, in relation to Quién Dijo Ayer's themes, that "yesterday is the cumulus of this that put us here, which raised us and made us what we are, for good or bad.

[8] Mexican website Terra categorized the video as a "jewel of elegance and simplicity of the Guatemalan singer in all its creative glory.