My 10 year old daughter and I have made an apple playlist called "Sleepy Time."
Obviously its a list of music she listens to when going to sleep. She and I have added to it over the years. Most nights I at least lay on the floor and listen until she's comfortable and then I leave. Last night this song came on. I didn't add it, she did. I have no idea where she heard it. It's an "obscure" 80's song that I loved. My older sisters would listen to music at bedtime and they had a large stereo. I could hear it in my room when I was falling asleep.
I asked her about it this morning and she was like, "I don't know where I heard it, I just liked it." She has good taste in music.