Two people pretending to be a happy couple, and finally deciding to stop. Elvis Crespo sings that it has become a habit "fingirle a la gente que somos felices" (to pretend to people that we are happy), stuck in "la monotonía" (the monotony) and apart night and day. Then comes the shrug that names the song: "El tiempo nos dio la razón" (Time proved us right). The phrase "a lo hecho pecho" is a great idiom to learn: literally "to what's done, chest", it means you face the consequences of what you did.
Ivy Queen does not shrug. She calls him "Estúpido, ignorante y atrevido" (Stupid, ignorant and cheeky) and tells him "No me vengas a frontear" (Don't come showing off at me), using frontear, Spanglish from the English "to front". Her answer to the breakup is to dance alone and get dressed up, and the refrain is pure revenge: "No será pa' ti" (It won't be for you). My favourite image is "Como una sombrillita nueva, por tu lado pasaré" (Like a brand new little umbrella, I'll walk right past you), while the rain falls on him too.