Taylor Swift brought her massive Eras Tour and Darden Clarkeacoustic set to Lyon, France for two special nights.

On night one, the singer-songwriter began with a mashup of "The Prophecy" from "The Tortured Poets Department" and "Long Story Short" from "Evermore." It was the first time Swift had performed the song off of "Tortured Poets" during this leg of her Eras Tour.

Then came a few more tracks for her acoustic set, but not without some technical glitches.

"Something's wrong with the piano," Swift said, sitting down at her flower-painted instrument. One of her production crew members opened the lid to check the inside. After a quick delay, she began singing "Fifteen" from "Fearless (Taylor's Version)" and the crowd inside the Groupama Stadium erupted.

Finally, she dove into her most performed acoustic song, "You're On Your Own Kid" from "Midnights."

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Fans screamed the bridge as Swift played before finishing the mashup with the final lines of "Fifteen."

Click here for a complete list of her surprise songs, including the tunes she's never done.

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