Vidajena' is a colloquial and somewhat derogatory term that literally translates to "other people's lives." It's used to describe someone who is a busybody or a gossiper, constantly meddling in or talking about other people's affairs.
In the song, it highlights the protagonist's independence and how she's unaffected by those who try to bring her down. The line "Y la stalkean todas las vidajena'" (And all the busybodies stalk her) emphasizes that despite the gossip and scrutiny, she continues to live her life on her own terms, making it an interesting and culturally relevant word choice.
Boza's "Tick Tock" is all about a confident, independent woman who lives life on her own terms. She's a trendsetter, a "modelo de otras" [model for others], and doesn't care what anyone else thinks. The song paints a picture of her going out, wearing her mask ("se pone su tapaboca" [she puts on her mask]), and turning heads, but "cualquiera no toca" [anyone doesn't touch] her.
What really gets Boza's heart racing, making it go "tick-tock, tick-tock," is when she makes a TikTok video. He describes her as so captivating that even alone in her apartment, it "ya parece strip club" [already looks like a strip club]. She's traveled to Madrid and New York, buys designer brands like Balenciaga and Louis Vuitton, and doesn't need a man in her life, preferring to be "mejor sola que ganar mala fama" [better alone than to gain a bad reputation]. She truly lives by her motto: "I don't give a fuck."