"Surprises are the essence of 'Deadpool'"
The concert saw her play ‘Say Don’t Go’, ‘Welcome To New York’ and ‘Clean’ during the surprise song section
The song appeared on Swift's recent double album 'The Tortured Poets Department: The Anthology'
"As my teammate's girlfriend says, 'familiarity breeds contempt'," Butker said
Including covers of BTS and Billie Eilish
The upcoming stint includes eight sold-out shows at Wembley Stadium
The singer-songwriter played four 'Eras Tour' concerts in the French capital recently
"I’m SO fired up to play this for every crowd"
Abrams opened for Swift's 'Eras Tour' concerts last year, and will do so again later this year
“Maybe I’d sing one of my favourite songs from the Fearless album and see if you guys can match the volume of earlier," the singer told the crowd