Taylor Swift's fans have theorized that she gets to her Eras Tour stage inside of a janitors cart. Now, video proves it's true.

• Fans have confirmed the latest Taylor Swift theory: That she arrives on stage in a janitor's cart. 
• Videos show Swift emerging from a cart stocked with mops in a sparkly leotard before her set. 
• In one video, Swift waves to fans seated behind the stage for the Eras Tour after her set.

Taylor Swift's Eras Tour kicked off in Glendale, Arizona last month, with Swift so far welcoming hundreds of thousands of fans to see her perform for the first time since 2018 across three cities. 

Since the first night of the tour, fans have wondered how the popstar stealthily arrives beneath the venue's stage to emerge mere minutes later clad in a sparkly leotard while belting the chorus of 2019's "Miss Americana and the Heartbreak Prince."

The venues that Swift is visiting on tour have sold "obstructed view" seats that place fans behind the stage but in front of a giant screen so they, too, can see the show.

Because this group sits behind the scenes, some observant Swifties began to theorize that Swift secretly entered the stage in a massive janitor's cart, emerging just minutes before she starts her over three-hour-long set list.

Why? Because at every show, the same suspicious cart has rolled up and entered the stage area while Lady Gaga's "Applause" blares on the stadium's sound system — the song that Eras Tour goers have recognized as the one that plays just before Swift goes on. 

After three cities down on the tour, Swifites have the receipts to prove the theory. 

Video from Swift's Arlington, Texas, concerts shows her stepping out of the janitor's cart, seeming to confirm the wild fan theory. 

Whether Swift is in on the joke or just happened to emerge earlier than usual is unclear, but it appears only a lucky few Swifties will be able to confirm the theory in person.