Taylor Swift Has a Rockin' Good Time Performing 'Boom Clap' with Charli XCX

After taking a trip down memory lane to her country roots with Keith Urban in Toronto on her 1989 World Tour, Taylor Swift brought out Charli XCX the next night in the same city. The two performed the latter’s Sucker hit (or punch, if you will), “Boom Clap,” and it looks like both ladies had a pretty damn good…