"Fuiste Mía Alguna Vez" by Espinoza Paz translates to "You Were Mine Once" in English. The song tells the story of a past romantic relationship where the singer reminisces about being with someone who is now forbidden or off-limits. Despite the relationship's end, the singer expresses that he feels no anger, jealousy, or pain. He emphasizes that he is not stressed or upset about their separation. The lyrics add that the singer had the person all to himself, spending countless nights together. He kissed their body, face, and lips, deeply connecting with their soul. The singer claims to have given them love before anyone else did and made them experience things they had never felt before. He conveys that he was their teacher who taught them how to feel love. Now, he allows them to show the world what they have learned from him and experience love beside him. The lyrics also mention the importance of remembering specific places, dates, and episodes, hinting at cherished memories shared between the two. It is implied that the singer wants the person to remember the significant moments they had together. Overall, "Fuiste Mía Alguna Vez" is a bittersweet song that reflects on a past relationship where the singer still feels a strong connection, despite knowing that they can no longer be together.