Taylor Swift didn't 'give a warning sign' for this acoustic set song in Warsaw

"Welcome to the acoustic set," Taylor Swift said for the 126th time on the Eras Tour.

After explaining to the Warsaw crowd that she does a different selection of songs on the guitar and piano unique to every city, the singer in a flamingo pink dress said, "I wanted to do this one because every day is a fairy tale in Poland."

The PGE Narodowy stadium of 65,000 fans knew ? with the not-so-subtle lead-in ? that Swift would perform the "Fearless (Taylor's Version)" song "Today Was A Fairytale" on the guitar. They were unaware she would blend in "I Think He Knows" from "Lover."

"Today was a fairytale, I ain't gotta tell him I think he knows," Swift sang at the end of the mashup, setting down her guitar. Her bubble gum pop mixture was a stark juxtaposition to the melancholic ballads she fused on the piano.

For her other song mashup, Swift combined "The Black Dog" from "The Tortured Poets Department," a fan-favorite breakup song about watching your ex, who still shares their location, walk into a bar with a new date. She combined it with "Exile" from "Folklore," a duet she performed with Bon Iver. Although the American indie folk singer didn't appear as a special guest, the Warsaw crowd loved the mashup.

Swift's next stop is Vienna, Austria where she will play three concerts on Thursday, Friday and Saturday.

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This article originally appeared on Nashville Tennessean: Taylor Swift didn't 'give a warning sign' for acoustic set in Warsaw