Taylor Swift is celebrating a major milestone as she nears the end of an era.

In an Instagram post on Sunday, the pop superstar reflected on playing the 100th show of her wildly popular Eras Tour, which occurred last week in Liverpool.

"We played our 100th show on The Eras Tour (which feels truly deranged to say because this show feels new to me every time we play it)," Swift wrote, sharing a gallery of on-stage photos and one backstage snap.

"I want say thank you to our Eras Tour crew, my fellow performers and band who have now committed hundreds of hours to putting on this show and giving their all on and behind that stage. I can't believe the work ethic, creativity and dedication I get to be surrounded with every day."

She continued by thanking the crowd at her three Liverpool shows for being "so expressive and generous and endlessly FUN," adding, "AND thank you to everyone who has come to any of the shows on The Eras Tour. It's been the adventure of a lifetime because of you."

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While performing in Liverpool last week, the "Fortnight" singer confirmed the Eras Tour, the highest-grossing concert tour of all time and the first to gross $1 billion, will end in December. She acknowledged the impending conclusion of the tour during a speech before her song "All Too Well."

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"This is the very first time I've ever acknowledged to myself and admitted that this tour is going to end in December," Swift told fans. "This tour has really become my entire life, it's taken over everything, like I think I once had hobbies. All I do when I'm not on stage is sit at home and try to think of clever acoustic song mashups and think about what you might want to hear."

She also acknowledged the 100th show milestone, saying this number "blows my mind" and "doesn't feel like a real statistic." Swift described the Eras Tour as the "most exhausting, all-encompassing, but most joyful, most rewarding, most wonderful thing that has ever happened in my life."

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The Grammy-winner kicked off the Eras Tour in March 2023, and she's set to return to North America in the fall. The tour's final show is currently scheduled for Dec. 8 in Vancouver.

The filmed version of "The Eras Tour," which was released theatrically last year and later debuted on Disney+, is the highest-grossing concert film of all time. It has not yet been announced if an updated version of the movie will be released after Swift tweaked her concert setlist to incorporate songs from her latest album, "The Tortured Poets Department."

Contributing: Bryan West, USA TODAY NETWORK