Perdida means "lost" in Portuguese. While it might seem like a common word, its placement in the song's title, "Minha Estrela Perdida" (My Lost Star), gives it a profound and evocative meaning.
In the context of the song, "estrela perdida" refers to a lost love or a lost sense of direction in life, making the word "perdida" central to the song's emotional core. It's a simple yet powerful word that captures the longing and melancholy of the lyrics.
Gusttavo Lima asks for one last favor here, and it's an odd one: he wants to be lied to. "Mente que eu finjo que acredito no seu coração" (Lie, and I'll pretend I believe your heart) lays out the whole deal up front. He knows the relationship is over. He just wants his ex to keep playing the part a little longer, because the performance itself is what he's chasing, not the truth underneath it.
He's careful to keep the request small. "Só um beijo e nada mais" (Just a kiss and nothing more), "Só um sonho e nada mais" (Just a dream and nothing more), "Uma noite pra esquecer de uma vida" (One night to forget a lifetime). One kiss, one dream, one night, bounded little doses of a love he already knows isn't real anymore. The title line, "Minha estrela perdida" (My lost star), names what he's actually after through all of it: not her, but the feeling of being wanted that vanished when she did.