Two concert-goers stole the show at a Billie Eilish's concert after turning up in glowstick costumes. Billie Eilish was performing at the Qudos Bank Arena in Sydney, Australia, on Monday (Feb 24 ...

Billie Eilish performs onstage during the HIT ME HARD AND SOFT: THE TOUR at The Kia Forum on December 21, 2024 in Inglewood, California. Kevin Mazur/Getty Images for Live Nation Entertainment ...

Billie Eilish performs with Billie Joe Armstrong of Green Day during the FireAid benefit concert on Thursday, Jan. 30, 2025, at The Forum in Inglewood, Calif. AP Photo/Chris Pizzello ...

A video posted on TikTok featured a young woman dancing, with the words "I'm selling 3 tickets for Billie Eilish" printed on the screen. "Everything, to me, seemed legitimate," Brangan said.