Luceros literally means "bright stars" or "morning stars". It's a beautiful and common poetic term in Spanish used to describe someone's bright, shining eyes.
In the song, Shakira sings "Tus dos luceros es to' lo que quiero" (Your two bright stars are all that I want), using this romantic metaphor to express how captivating her lover's eyes are. Learning this word is a great way to discover the poetic side of Spanish love songs!
This song is a huge, passionate declaration of love! Shakira sings about finally finding the person she's been searching for her whole life: "Tanto te busqué hasta que llegaste" (I searched for you so much until you arrived). Now that she's found them, she's not holding back at all. The feeling is so intense that she says the desire "me devoran" (devours me) every single second.
She's completely focused on this one person, telling them the rest of the world doesn't matter. It's all about physical connection and being together in the moment. She's very direct, using lines like "Sin tus ojos azules me muero" (Without your blue eyes, I'll die) and demanding kisses now and later. The repeated shout of "¡Adentro!" (Inside!) feels like she's saying she carries this person deep inside her heart and soul. It's a song about a love that's all-consuming and urgent.