Taylor's Surprise '1989' Mashup at Stockholm Eras Show 

Taylor Swift gifted fans a '1989' mashup at Stockholm's Eras Tour show. 

During the acoustic set, she played "Say Don't Go," "Welcome to New York," and "Clean." 

The wristbands lit up bright blue, the color of the '1989' era. 

Fans flocked to Friends Arena in record-breaking numbers for the 89th show. 

Swift incorporated a "Tortured Poets" set and other changes for year two. 

Stockholm temporarily changed its name to "Swiftholm" for her visit. 

Her boyfriend Travis Kelce wasn't spotted, as he hosted a music festival. 

Surprisingly low resale ticket prices were seen, compared to U.S. shows.