It was released as the second single from Fonsi's album on December 1, 2008 and became his sixth number-one single on the Billboard Hot Latin Tracks chart, the second number-song for David Bisbal on the same chart, and the first for Aleks Syntek and Noel Schajris (as a solo performer).

"Aquí Estoy Yo" was released on December 1, 2008 as the second single from Palabras del Silencio, the seventh studio album recorded by Puerto Rican performer Luis Fonsi. This song is the follow-up to "No Me Doy Por Vencido" and was written by Fonsi in 2008, according to an interview on the Mexican newspaper El Universal: "I wrote it six years ago to four male voices and in all these years I never knew what to do with the song, I thought maybe give it to some group, but as I loved it so much, decided to keep it." About the choice to perform with Noel Schajris, David Bisbal and Aleks Syntek, Fonsi told Billboard magazine: "One day I thought and I said, why not invite three guys, three friends, not difficult to reach them, they can talk to you one on one, because it had happened but they were my friends." While on a boat fishing with Bisbal, Syntek and Schajris, Fonsi asked them to record the track, since it was "an amazing song and the only thing I do is look at three musketeers sing to me". Fonsi thought that the diversity would help this "hymn": "We have México, Argentina, Spain and Puerto Rico in the same track." During the recording, there were no rules, it was a mix of artistic styles, like a bohemian reunion with friends. On the album review, Jason Birchmeier of Allmusic declared that this was a notable song, that features a quartet of international all-stars.

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