Throughout Charli XCX‘s cease at Madison Sq. Backyard for her co-headlining Sweat tour with Troye Sivan, the “Von Dutch” singer was joined by Lorde throughout Monday’s efficiency.

In a shock set, Lorde took the stage to carry out their “Lady, so complicated” remix alongside Charli for the primary time. The pair strutted side-by-side, as they sang the pre-chorus: “Individuals say we’re alike/They are saying we’ve bought the identical hair/It’s you and me on the coin the trade likes to spend/And after we put this to mattress, the web will go loopy/I’m glad I understand how you are feeling.”

Addison Rae additionally joined Charli on stage, together with Sivan, for a stay debut of her new observe, “Food regimen Pepsi,” and to carry out their “Von Dutch” remix, which additionally featured contemporary manufacturing from A. G. Cook dinner.

The Sweat tour launched on Sept. 14 in Detroit, Michigan, at Little Caesars Area, and is at present set to conclude on Oct. 23 in Seattle, Washington. Charli and Sivan will go to Toronto, Columbus, Philadelphia, Nashville, Atlanta, Orlando, San Diego, Portland, and extra all through their expansive trek.

In October 2018, Charli and Sivan first teamed up for “1999,” which appeared on the album Charli. Lower than a yr later, they collaborated once more for the sequel single “2099.” The tour is in help of Charli’s large album Brat and Sivan’s 2023 LP One thing to Give Every Different.