Derrumbaría is a dramatic verb that means "I would collapse" or "I would crumble". It comes from the verb derrumbar, which literally means to demolish or knock down, like a building.
In this passionate ballad, Jennifer Peña uses it metaphorically to express complete emotional devastation. She sings, "Me derrumbaría si me dejaras de amar" (I would collapse if you stopped loving me), creating a powerful image of her entire world falling apart without her lover.
This song is a powerful declaration of love that borders on obsession. Jennifer Peña isn't just saying she likes someone; she's saying her entire world would fall apart without them. She admits she would "enloquecer" (go crazy) if her partner left and that she needs them "igual que al agua" (just like water). It's an intense feeling, where she's almost scared by her own "gran necesidad" (great need) for this person.
The chorus takes this feeling to a global scale. She makes huge promises, saying she would go "Hasta el fin del mundo" (To the end of the world) to find her love. She would even "Cruzaría los siete mares" (cross the seven seas) to reach them. This isn't a casual romance; for her, nothing is more important than being together, and she even prays to God to protect their love. It's a dramatic and sweeping promise of absolute devotion.