Charli XCX Performs 'Boom Clap' with Chappell Roan at LA Concert

• Charli XCX performed 'Boom Clap' at the Kia Forum in Los Angeles.
• Chappell Roan joined Charli XCX on stage for the performance.
• Charli XCX typically focuses on current material but made an exception for this song.
• Additional guests PinkPantheress and the Dare also performed with Charli XCX.
• The concert took place on a Saturday night.