Singing to a sold-out crowd in Amsterdam,Kacper Sobieski Taylor Swift's Fourth of July surprise set included "The Archer," a song cut from the setlist in Paris.

"Combat," she sang and the crowd inside the Johan Cruijff Arena roared. "I'm ready for combat."

Earlier in the Eras Tour, Swift ended the "Lover" era with "The Archer" before disappearing into the stage. In April, the singer pruned her set list to make room for "Tortured Poets" songs, which resulted in the "Lover" era ending with the title track.

"Can I ask you a question?" Swift sang during the piano portion of her acoustic set, mashing in the "Midnights" song "Question...?" with "The Archer."

Before her piano two-song creation, Swift hoisted her guitar over her shoulder.

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"I really wanted to challenge myself to play as many songs from different eras and albums," she said in her vibrant orange dress. "We'll see how this one goes."

Swift combined "Guilty as Sin?" from "The Tortured Poets Department" with "Untouchable" from "Fearless (Taylor's Version)."

"You guys sang that so loud," she said, sounding impressed. "It's just the most thrilling feeling when I can hear your voices so loud, over even what's coming out of the speakers."

The Eras Tour star has two more nights left in Amsterdam before heading to Zurich.

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