Originally written and released by Leo Dan in , the song is one of the most recognized hits in Spanish-language music.

The live performance video is a central piece of the Celebrando a una Leyenda project, which features other Latin icons like Vicente Fernández and Rubén Albarrán.

Leo Dan is considered a leader of the "Nueva Ola" movement of the 60s and 70s, and this duet serves as a bridge between his generation and Montaner's legendary status in the 80s and 90s.

Leo Dan wrote the song after being invited to the 17th birthday party of a girl he was deeply in love with as a teenager, only to realize his feelings were unrequited.

It depicts the raw pain of heartbreak, focusing on a protagonist who promises to forget their lover while they watch that person prepare to marry someone else.