Being the kind of person who leaves hidden messages in her album notes, Taylor Swift is permanentlydropping clues about her music to see if/when her fans ever catch on.

If you're one of the almost 100 millionfollowers who keep up to date with Taylor's cats and inflatable swans on social-media, you'll also know that she also has a habit of sharing her favourite songs.

From Ed Sheeran to Haim, Taylor has a whole library of music recommendations up her sleeve, and she's eager and willing to give her favourite musicians ashout-out that could literally make their career.

But it turns out Taylor sticks to a particular *rule* about exactly when she takes those screenshots, and - as we should've guessed -itall leads back to her eternal love for the number thirteen.

The investigatorsat Buzzfeed were the first to notice that Taylor screenshots the trackat precisely 0.13 on pretty much ALLthe Apple Music grabs she's ever posted.

Er, minus one time she forgot with Troye Sivan, but hey, everybody makes mistakes...

Incredibly, the habit has been going on foryears now, but is only' just'worming it's way into the internet's collectiveconscious mind.

It begs the question, what ELSE are we overlooking?

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