Their co-headlining trek hit Madison Square Garden in New York City.

On Monday evening, the duo took to Madison Square Garden and were joined on stage by Lorde, who performed "Girl, so Confusing ...

Charli XCX and Troye Sivan bring out Lorde and Addison Rae at Madison Square Garden in New York City. The surprise guests ...

The “360” singer hosted a star-studded Sweat Tour afterparty Monday night, following her and Troye Sivan’s sold-out show at ...

Charli xcx brought out all the "good ones" at the New York City Sweat Tour. On Sept. 24, the pop star, 32, had a few ...

During Charli XCX's stop at Madison Square Garden with Troye Sivan for their Sweat tour, the "Von Dutch" singer was joined by Lorde and Addison Rae.

LORDE JOINING CHARLI XCX TO PERFORM THE GIRL SO CONFUSING REMIX AT SWEAT TOUR IS THE BEST THING THAT EVER HAPPENED IN POP CULTURE THIS YEAR. ITS FOR THE HISTORY BOOKS pic.twitter.com/iqBUiXof66 ...

Lorde really does ride for Charli. Charli XCX brought out Lorde for a performance of “Girl, so confusing” in New York City ...

Brat summer might be over, but Charli XCX is still dominating music this autumn. The pop star releases the remix album soon, and she’s currently on her massive Sweat tour with Troye Sivan. Tonight the ...

Charli XCX and Troye Sivan created a brat moment in their star-studded party on Monday night.After their Sweat Tour show at ...

With September 22 in the rear view, BRAT Summer is officially, technically over. However, Charli XCX isn't going anywhere.