Charli XCX & Troye Sivan Perform: Watch Here

Charli XCX and Troye Sivan transformed The Tonight Show Starring Jimmy Fallon’s stage into a bumping club for their performance of “1999” on Monday.

Drowned in green lasers, the pair grooved along to their Nineties-obsessed lyrics. Dressed in club-ready garb – Charli XCX wore a matching slick dark blue jacket and miniskirt and Sivan was in stylish red pants – they bounced around the fog-covered stage.

Sivan also joined Fallon for a chat, discussing the track and its video and his first appearance on the program, as well impressing the host and in-house band The Roots with his “athletic” skills.

Troye Sivan recently landed another top 10 with his new album, Bloom and he stars in the new drama Boy Erased.