Watch Taylor Swift and Charli XCX Perform ‘Boom Clap’

Taylor Swift seems to have inducted another member into her squad. The pop singer took the stage Saturday for the second night of her 1989 World Tour stop in Toronto and brought out Charli XCX.

The two dueted on “Boom Clap,” and Swift posted a video clip of the performance on Twitter.

XCX tweeted back her thanks and complemented Swift’s choice of wardrobe for her tour.

Swift welcomed Keith Urban on stage at her first Toronto show on Friday night. The singer’s ever-growing squad of celebrity guests (which already includes the likes of Nelly, Mick Jagger, Julia Roberts, and Matt LeBlanc) was also the subject of a sketch this weekend on the SNL season 41 premiere. With all the stars Swift keeps adding to her circle, Saturday Night Live envisioned a post-apocalyptic world in which the squad engulfed just about everyone.

This article originally appeared on EW.com