Turns out Taylor Swift [1] isn't just acting in the upcoming Cats movie [2] — she's also co-written a new original song for the live-action adaptation of Andrew Lloyd Webber's Broadway musical [3], and it sounds hauntingly beautiful. In a behind-the-scenes video just shared by Universal Pictures, Swift chats about how she worked with Webber to write the lyrics of the track, titled "Beautiful Ghosts." Although ballet dancer Francesca Hayward [4], who plays the role of Victoria, will be the one performing the song in the film, Swift has recorded a studio version that will play as the ending credits roll. Listen to a snippet of "Beautiful Ghosts" in the video above, and then refresh your memory on the star-studded cast of Cats [5] before it hits theatres on Dec. 20.