For their second ever performance of 1999 together and the first major TV performance, Charli XCX and Troye Sivan just turned the Tonight Show With Jimmy Fallon stage into a laser-filled rave.
Dressed to the nines in pleather and shrouded in smoke, Charli and Troye are just proving that they can basically turn any room into a party.
The first time the pair performed 1999 together was back in October, when Charli surprised Troye Sivan at his sold out Radio City Music Hall performance in NYC.
Charli's just wrapped up a huge tour in Australia making the rounds alongside Taylor Swift, where she also played a heap of wild, sold-out parties and one very exclusive Pop2 show in Sydney for a handful of lucky fans.