In the car:
T: Can you put on that song?
Me: Which one?
T: I don't know which one
Me: How does it go? Sing a bit for me.
T: I can't. I don't know.
Me: I can't put on a song if I don't know which one you mean.
Later, just now. I'm putting on music.
T: Can you PLEASE put on that song?
Me: I don't know what song. You don't know the title, or the melody or any of the lyrics.
T: It's that one that you and me both like.. it's like 'hip-hop slash.. uhm (she's great with genres, just like her mother)... uhm.
Me: Go clean your room.