Charli xcx and Chappell Roan Revive ‘Boom Clap’ in L.A.

Charli xcx reached back to one of her defining early hits in Los Angeles, bringing Chappell Roan onstage for a surprise duet of “Boom Clap” at the Kia Forum on Saturday night.

The appearance came during Charli’s Music, Fashion, Film Tour. Before the performance, she explained that each show includes an older song and that her invited guest had agreed to join only if they could sing this particular track. Roan then emerged for the 2014 single, turning a nostalgic catalog choice into the night’s biggest crossover moment.

A rare return to an early hit

“Boom Clap” helped move Charli into the pop mainstream more than a decade ago, but it has not been a regular feature of her recent live sets. Variety reported that the Kia Forum performance marked her first time singing the track onstage since 2023. The choice stood out because the current tour has otherwise emphasized her newer creative era rather than leaning heavily on past singles.

Roan’s involvement added another layer to the moment. Both artists have built intensely loyal audiences while favoring bold visual identities and highly theatrical pop performances. Their pairing felt less like a routine guest slot and more like a meeting between two performers who have helped shape the genre’s current direction.

The guest list kept growing

The collaboration was not the concert’s only surprise. Rolling Stone reported that Charli also welcomed PinkPantheress for “Stateside.” Later, the Dare joined her for the remix of “Guess,” the version originally recorded with Billie Eilish. That sequence gave the Los Angeles date the feel of a compact pop showcase rather than a standard tour stop.

For Charli, reviving “Boom Clap” did not signal a retreat into nostalgia. Instead, the performance connected an earlier breakthrough to the experimental, collaborative world she now occupies. With Roan beside her and a series of younger pop voices moving through the set, an old hit became a reminder of how much Charli’s influence—and her circle—has expanded.