To write a story about a character listening to a song they love, you would have to do something that would relate to the character. For example, you could listen to a song that you love to inspire you. Or you could do something else that reminds you of that, or another, character. You can base them off of anything. Here is a sentence that I use in many of my stories: "To get away from the dramas that lay before her, she put in her earbuds, turned on her rock playlist, and drew out what lay within her mind."