Resolves to the number of albums total Taylor Swift will have released before turning 40 (Dec. 13, 2029) - this includes the 10 she has already released! Taylor has to be a main artist on the album, so movie soundtracks and other compilations don't count. Also, the album has to be original music (so the originals and the rerecordings count as one). If she has announced an album but not released it by her 40th birthday, it won't be counted.

If she releases an album on her 40th birthday, I'll have to find a swiftie who knows her bday down to the time (I'm sure they exist).