Me da la gana is a very common and expressive way to say 'because I feel like it' in Spanish. It's much more emphatic and defiant than simply saying 'porque quiero' (because I want to).
In 'Mala Fama', Danna Paola uses it to assert her independence against the gossip surrounding her. She sings, "Yo hago lo que quiero si me da la gana" (I do what I want if I feel like it), making it a powerful statement of self-confidence and a fantastic phrase to add to your vocabulary.
People love to gossip, and Mexican pop star Danna Paola knows it better than anyone. In "Mala Fama" (Bad Reputation), she laughs right in the face of tabloid drama. Rumors say she falls in love at night and forgets about it by morning ("Que me enamoro por la noche / Y se me pasa en la mañana"). She doesn't apologize for having high standards that scare boys off ("Yo soy exigente y los nenes se asustan"). She even drops actual celebrity names to shut down the tabloids directly: no, she didn't leave with Maluma, she is not with Yatra, and she isn't seeing Neymar or Ozuna either. Instead, she happily sleeps alone in her bed ("Yo duermo sola en mi cama") and could not care less about what the headlines say.
She has zero interest in a fake smooth-talker who talks big without delivering—what she calls a weekend Romeo who tries to sell her the stars without taking her to heaven ("No busco un Romeo / De fin de semana / Que me venda las estrellas / Sin llevarme al cielo"). When empty promises blow away, she refuses to take the blame. Still, she isn't sworn off romance forever. She lays out an exact, funny checklist for anyone who wants a real shot: first, he must be single ("Lo primero es que sea soltero"); second, he needs a brain ("Con cerebro sería el dos"); third, good looks ("Que esté bueno va de tercero"); and finally, a good sense of humor. When that guy finally shows up, she promises she won't let him go.