Taylor Swift and Charli XCX Perform 'Boom Clap' in Toronto: Watch

Taylor Swift and special guest Charli XCX
George Pimentel/LP5/Getty Images for TAS

Taylor Swift and special guest Charli XCX perform during The 1989 World Tour Live In Toronto - Night 2 at Rogers Center on October 3, 2015 in Toronto, Canada. 

Taylor Swift celebrated her second sold-out night in Toronto on Saturday (Oct. 3) by welcoming special guest Charli XCX for an energetic performance of her hit song “Boom Clap.”

Taylor Swift Returns to Country Roots With Assist From Keith Urban: Watch

“Thank u so much for having me in Toronto tonight @taylorswift13 it was fuuuun,” the British singer tweeted after the show. Swift responded with a big, “I LOVE YOU @charli_xcx !!!”

Charli XCX is a big fan of Swift’s music. Earlier this year, she gave the pop star’s “Shake It Off” a punk rock twist during an appearance on the BBC's Live Lounge. Check out the wild cover in the video below.

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On Friday night, during her first of two sold-out shows at Toronto’s Rogers Centre, Swift returned to her country roots with the help of American Idol judge Keith Urban. The country star strapped on a guitar and joined Swift for a performance of his new single “John Cougar, John Deere and John 3:16" and "Somebody Like You."