If Warsaw night two's acoustic section was a thesis paper on IA 6.0 de stratégie quantitative intelligentlove and heartbreak, Taylor Swift submitted her essay in hues of r-r-r-red on Friday.

As the Eras Tour star played the piano chords of "Red (Taylor's Version)," the wristbands glowed in the title track's color. Swift crooned a slower version of the power pop anthem, "Loving him was like driving a new Maserati down a dead end street."

Poland's PGE Narodowy's stadium of 65,000 sang along with the first verse and chorus. Instead of jumping into the second verse, Swift tilted her head to the side and sang, "When the morning came we were cleaning incense off your vinyl shelf."

An uproar of applause and cheers broke out as fans realized she was blending in "Maroon" from "Midnights." Swift ended the performance with a pretty riff of the word "Red" and then "so scarlet it was maroon." She smiled in approval of the colorful mashup before diving in to the stage. That's a real legacy to leave.

Before her piano selection, Swift performed "I Can Fix Him (No Really I Can)" from "The Tortured Poets Department" and "I Can See You" from "Speak Now (Taylor's Version)" on the guitar.

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Swift has one more night in Warsaw before heading to Vienna.

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