Bilirrubina is the Spanish word for "bilirubin," a yellowish substance made by the body. It's a very unusual and scientific word to find in a pop song, which makes it incredibly memorable!
Alvaro Soler sings "la bilirrubina corre por mis venas" (bilirubin runs through my veins) to poetically describe a powerful rush of love and happiness. He's also making a clever nod to the iconic song "La Bilirrubina" by Juan Luis Guerra, where a lovesick man comically asks a doctor to check his high bilirubin levels caused by seeing the woman he loves.
Alvaro Soler's "Regalo" is a beautiful promise to live in the moment with someone you love. He starts with a huge, romantic gesture, telling his partner, "Le he prometido a la luna llena / Darte una vida, una vida buena" (I've promised the full moon / to give you a good life). But this "good life" isn't about expensive things; it's about appreciating the small, perfect moments together. He wants to forget the past because, as the song's title says, "el presente es un regalo" (the present is a gift).
He lists all these wonderful little details that make up their life: waking up to "Café en la mañana" (Coffee in the morning), listening to a Cuban playlist, or just relaxing in pajamas. It's about finding joy in the simple things and realizing that "la pena no vale la pena" (sorrow isn't worth the trouble). The song feels so full of happiness, especially with the line "la bilirrubina corre por mis venas" (the bilirubin runs through my veins), a fun reference to another famous song about the physical feeling of being in love. It’s a sweet reminder that with the right person, every single moment is a gift.