Cautiva is a beautiful and poetic verb that means 'to captivate' or 'to enthrall'. It comes from the same root as 'captive', suggesting being completely held by someone's charm or beauty.
In the song, the singer says, "Esa mirada me cautiva" (That look captivates me), expressing how he is completely mesmerized and enchanted by the girl's gaze. It’s a much more dramatic and romantic word than simply saying 'me gusta' (I like), making it a great word to add some flair to your Spanish.
This song is all about being completely captivated by someone on the dance floor. The singers see a woman whose dancing is so amazing it messes with their heads: "Siempre que ella baila así / A mí me daña la cabeza" (Whenever she dances like that / It messes with my head). She's so magnetic that she "Me robó el corazón sin permiso" (Stole my heart without permission), and her movements have left them totally "indeciso" (undecided).
But what is he undecided about? Well, the song gets a little messy and playful. One verse drops a bunch of different women's names, telling one not to tell another that he was with someone else entirely: "Sofia, tú no le digas a Lucia / Que la otra noche yo estuve viendo a María" (Sofia, don't you tell Lucia / That the other night I was seeing María). So maybe he's not just undecided about this one amazing dancer, but he's juggling a few situations at once! At its core, though, it's a fun party track about that moment you see someone whose confidence and style just stops you in your tracks.