"Bad Blood," meet Mudblood.
That's thanks to enterprising YouTuber Kate Parkin, who took several of Taylor Swift's 1989 songs and changed the lyrics into a delightful mash-up touting the values of Hogwarts School of Witchcraft and Wizardry. Is there anything Harry Potter can't be worked into? Not if the Internet has anything to say about it.
Parkin's tunes are sung from the perspective of various characters in the Potter-verse, which means she's donning Luna's crazy wig and glasses and singing about Draco Malfoy's various feuds.
Welcome to Hogwarts, it's been waiting for you.