The song was written by Xabier San Martín (member of the Spanish band La Oreja de Van Gogh) and was released on radio on July 24, 2006. The song was released on iTunes Store on August 15, 2006, becoming Rubio's first digital single after fans petitioned for a legal way to obtain it prior to the album hitting stores.
"Ni Una Sola Palabra" is a song that captivated me from the first time I heard it, the lyrics, the rhythm... I can relate to it completely. In the process of its recording and production, it shone right from the beginning... I am very happy to be able to hand out something that I am very proud of. I love it! And I hope that people will enjoy it as much as I do.
Ni Una Sola Palabra debuted at #4 on the Hot Latin Tracks becoming Rubio's highest debut ever on the chart. The song went on to become a huge success peaking at #1 on both the Hot Latin Tracks and Latin Pop Airplay charts for several weeks. It has also managed to chart at #98 on the Billboard Hot 100 becoming her third song to chart there. As of December 11, 2009, "Ni Una Sola Palabra" ranked as the 59th song of the last ten years in the Top Latin Songs Chart from Latin Billboard.