No sé qué literally translates to "I don't know what", but it's a popular phrase used to describe a special, hard-to-define quality—the Spanish equivalent of the French je ne sais quoi.
In the song, the singer feels this indescribable spark when their hands touch for the first time: "Sentí ese no sé qué" (I felt that 'certain something'). It perfectly captures the mysterious feeling of instant attraction, making it a charming and useful phrase to learn.
This song is all about that one perfect, electrifying first kiss. Becky G and Paulo Londra tell the story of seeing someone and immediately thinking, "Supe que no eras para mí" (I knew you weren't for me), probably because they were already with someone else. But the connection is so strong that they decide to go for it anyway. The result is a kiss so amazing they feel like they've touched the heavens: "Cuando te besé / Sentí que toqué el cielo" (When I kissed you / I felt I touched the sky). They have zero regrets and would do it all over again in a heartbeat.
What starts as a simple walk, holding hands, and an unexplainable feeling quickly turns into something more. Paulo Londra's part is especially sweet; he says he was "Forever alone pero te vi a vos" (Forever alone but I saw you) and suddenly his whole world changed. He's completely captivated, begging for one more dance and admitting this person is the only one who "puede calmar mi corazón" (can calm my heart). It's a story of instant chemistry and the hope that a single, perfect moment can turn into something real.