regarding the whitenoise it adds character to the clip which will help distinguish it if you add it either in between a track before a chorus/whatever or at the beginning. "Se le cayo el corazon" is sorta like saying she/he pulled my heart outta my chest when it involves love another reference is when someone "scares the shit out of you" well in spanish its a less vulgar figure of speech. it all depends on the context. hope it helps.
on Paper and Pen by xomoniicamo
on Vocal Loop - se le cayo el corazon... by diablobasura
on I take a stab at myself by GRAVEFLOWERS