Taylor Swift Tears Up While Discussing Eras Tour’s ‘Biggest Challenge’ in New Docuseries Teaser

Taylor Swift pushed herself to the limits while executing the Eras Tour, and in a teaser for the fast-approaching Disney+ docuseries on how she pulled it off, the pop superstar acknowledges that doing so was “the biggest challenge” of her career.

Two days ahead of the premiere of her End of an Era project on Disney+, Swift shared an exclusive teaser for the first two episodes with Good Morning America on Wednesday (Dec. 10). The clip shows footage of the singer running intense rehearsals with her backup dancers and practicing surprise guest appearances with the likes of Florence Welch and Ed Sheeran.

“This was the biggest challenge any of us has ever done,” Swift says in a talking head, at one point wiping away a tear during an emotional moment. “Every single night, we’re going to do everything in our power to blow your mind.”

The first two episodes of End of an Era will arrive on Disney+ on Friday (Dec. 12), just one day before Swift’s 36th birthday. They are expected to delve into how the 14-time Grammy winner not only got her three-hour showcase off the ground night after night, but how she changed the setlist entirely partway through her two-year run to incorporate The Tortured Poets Department into the show.

“We had to be all hands on desk to put a new era into the show,” she says in the new teaser.

After the first two episodes of the six-part doc arrive, the next installments will be released on the streaming service on a weekly basis. The first people who got to see the project, though, were Swift’s band, dancers and family, whom she hosted for a private screening in New York City on Tuesday night (Dec. 9).

Watch the new GMA teaser for Taylor Swift’s End of an Era docuseries above.