Billie Eilish brought Charli XCX on stage to perform the Guess remix during her recent show in Los Angeles.
The Bad Guy singer thrilled fans on Tuesday night when she brought the British hitmaker on stage for a surprise live performance of their Grammy-nominated collaboration.
The concert took place at L.A.'s KIA Forum as part of Billie's ongoing Hit Me Hard and Soft world tour.
Attendees at Tuesday's show were treated to the duo's first live performance of the chart-topping track together.
Charli took to Instagram after the show to share a clip of the electrifying performance, writing in the caption, "love u billieeeeee and hbd (happy birthday)!!!"
The show took place a day before Billie celebrated her 23rd birthday on Wednesday.
The Guess remix was released in August 2024 as part of Charli's remix album Brat and It's the Same but There's Three More Songs So It's Not, which followed her smash hit album Brat.
The track has received critical acclaim and has been nominated for Best Pop Duo/Group Performance at the upcoming 2025 Grammy Awards.
Billie kicked off her Hit Me Hard and Soft: The Tour in support of her third studio album in Quebec City, Canada on 29 September and will conclude in Dublin, Ireland on 27 July 2025.
