Whether you've heard that song or not, maybe you've never heard it before. If that happens, if you're lucky, you have a co-songwriter or somebody who says, that new song sounds a lot like that old song.
Si has escuchado una canción o no, igual no la has escuchado antes Si eso pasa, tienes suerte, tienes un co-compositor o alguien que te dice, que esa nueva canción se parece a una vieja.