Swifties notoriously study any and all updates on Taylor Swift — and just landed a big one.

When Swift shared the track list for her upcoming album, “The Tortured Poets Department,” in February, fans began speculating that one of its songs, “But Daddy I Love Him,” is about one of Swift’s exes. Although it’s still unknown if the song is about one of the artist’s past partners, fans at least know something new about the track — that it’s nearly six minutes long.