Brotado is the past participle of the verb brotar, which means 'to sprout' or 'to bud', like a plant. It's a beautifully poetic word that you won't hear in every song.
In "PERLA", the singer uses this word metaphorically to describe how love has suddenly grown inside him. He sings, "ha brotado una raíz de amor en mi corazón" (a root of love has sprouted in my heart), creating a powerful image of a new, organic feeling taking root.
If you have ever stayed awake until 4 a.m. scribbling notes to a crush, you know exactly what Los Del North Texas is going through in "PERLA." He opens by admitting he went crazy from waiting so long, trapped in a daze because he is so infatuated. He writes, “Desvelado escribiendo poemas pa' ti / Sigo y sigo escribiendo y no encuentro fin” (“Staying up late writing poems for you / I keep writing and writing and find no end”). In Spanish, the word desvelado specifically means you missed out on sleep or were kept awake by something on your mind, which fits the late-night obsession here.
The real centerpiece of the track is the poetic comparison that gives the song its name: “tus ojitos blancos como las perlas del mar” (“your little white eyes like pearls from the sea”). He tells her that even though she wears fine jewelry (“Te cargas unas joyas” / “You carry some jewels”), her own glow outshines all of it. The idiom cargarse algo is used here informally to mean wearing, sporting, or carrying an impressive item. Calling himself a “loco enamorado” (“crazy man in love”), he puts all his cards on the table, hoping she feels the exact same spark that sprouted in his chest.