Facto is a Spanish word that directly translates to "fact" in English. While it might seem like a simple word, its use in this song is particularly interesting because it's a direct borrowing from English, often used in a more casual or emphatic way in modern Spanish slang.
In the lyrics, Becky G sings, "Suena cliché, pero es un facto" (It sounds cliché, but it's a fact). This highlights how she's using a contemporary, almost Spanglish, expression to emphasize the undeniable truth of her feelings, making it a memorable and culturally relevant word for learners.
The song opens by picking a fight with a horoscope. "Según el zodiaco / No somos compatibles, pero, baby" ("according to the zodiac, we're not compatible, but, baby") is the setup, and Becky G spends the rest of the track ignoring the verdict. Her best answer to the star charts is not an argument at all: "Ya no leo lo que dicen las estrellas / Y ahora las veo en tu cuarto" ("I don't read what the stars say anymore, and now I see them in your room"). She does not disprove the astrology, she relocates it.
The second verse is what stops this being a straightforward flirt track. "Cuando casi me rendía / Me estaba volviendo fría" ("when I'd almost given up, I was turning cold"), she sings, then "Conociendo a gente / Pero todos me aburrían" ("meeting people, but they all bored me"). That admission is why the title works: "Llegaste en el momento exacto / Suena cliché, pero es un facto" ("you arrived at exactly the right moment, it sounds cliché, but it's a fact"). She knows how obvious the line is and says it anyway. Worth noticing that facto is not standard Spanish, where you would expect hecho; she has taken the English fact and given it a Spanish ending, which is half the point of calling the song FACTOS.