Entra en Mi Vida by Sin Bandera is a song about the power of love and how it can take over in an instant. It tells the story of two people who meet and quickly realize that they have a special connection. The lyrics express the narrator's desire to have the other person in his life, and how he has come to need her. He opens the door to his heart and invites her in, promising that there will be no more lonely nights. The song is a reminder that love can happen in an instant and that it is worth taking a chance on.

Sin Bandera (translated as 'Without Flag') is a romantic ballads duo consisting of Mexican singer-songwriter Leonel Garcia and Argentine singer-songwriter Noel Schajris. They formed in Mexico in 2000. They became one of the most popular artists after their debut album Sin Bandera was released on March 26, 2002.