Snowglobe Allie made the 'Fantasy Swiftball' game so that Taylor Swift fans could enjoy her Eras Tour.
Image : Instagram
Allie, a Swift fan, made a poll where people could guess what Swift would wear and what songs she would sing at her shows.
Image : Instagram
Since then, the game has grown to 21 games with more than 18,000 players, attracting fans from all over the world who can't go to her shows in person.
Image : Instagram
The night of the show, fans go to Allie's X account and fill out ballots with their guesses for Swift's outfits and surprise songs.
Image : Instagram
Users get points for each right prediction, and at the end of the night, the fan with the most points wins.
Image : Instagram
It's hard to get a perfect vote, which is worth 113 points, because there are 24 questions and more than one way to dress.
Image : Instagram
Fans can make changes to their ballots and guesses right up until Swift goes on stage.
Image : Instagram
As the show starts, fans can watch livestreams run by people at the concert to see how their ballot is doing.
Image : Instagram
Winners get gifts from other fans, and Allie pays for the first two nights of their stay.
Image : Instagram
Allie started getting donations when she learned that she couldn't buy prizes for the winners every night of the concert.
Image : Instagram