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.

The "Birds of a Feather" singer hit the stage in coveted Air Jordan sneakers at her Los Angeles concert Tuesday night.

Billie Eilish welcomed Charli XCX onstage at the Kia Forum in Los Angeles last night for a surprise performance of their collaborative hit track "Guess." The energetic track comes off Brat and It's Completely Different but Also Still Brat,