Completarlo means “to complete it,” with -lo referring to something masculine, here the other person’s heart. In the song, he says he foolishly wanted to fill or make whole a heart that was not broken, but completely empty, giving the verb a poignant emotional meaning.
Alejandro Fernández and Calibre 50 open this one with a line that flips the usual breakup song: "Ya no te extraño, me dueles a ratos" (I no longer miss you, you hurt me at times). The singer is past missing her. What is left is a sting that comes back now and then, mostly "al recordar" (when I remember) how much he gave while she stayed "indiferente" (indifferent).
The heart of the song is one sharp image. He believed "que estaba roto tu corazón" (that your heart was broken), and then found out "no estaba roto, estaba vacío" (it wasn't broken, it was empty). He calls himself "de tonto, terco" (foolish, stubborn) for trying to fill it with his own. In the chorus he ranks her as the worst disappointment of all, one that left him "casi al borde de la muerte" (almost on the verge of death). The last line lands quietly: "Pero en paz sin ti" (But at peace without you).
Alejandro Fernández, known as "El Potrillo" (The Colt), is a celebrated Mexican singer born in Guadalajara, Jalisco, in 1971. The son of legendary Vicente Fernández, Alejandro initially gained fame specializing in traditional Mexican music genres like mariachi and charro before branching into Latin pop.
With over 20 million records sold worldwide, he has become one of the best-selling Latin music artists. Throughout his career, he has earned four Latin Grammy Awards and a star on the Hollywood Walk of Fame. Known for his powerful vocals and emotional performances, Alejandro has captivated audiences across Latin America and beyond, blending heritage with contemporary sounds in a prolific and dynamic career.