"Taylor Swift? Really?" Potter smiles wildly, his hair somehow trying to both get into his eyes and point towards the sky at the same time. Draco would have raised an arm and pushed it out of his eyes, if it wasn't so messily attractive in a way Harry Potter was.
Luna's bored and Snape's annoyed and Dumbledore is in a bit of a pickle. Well, it wasn't like Luna wanted to be a mind-reader, right? (Voldemort was going to have no idea what hit him...)