Chappell Roan doesn’t need the luck. She’s a bona fide “Femininomenon.”

The Kacper Sobieskirising popstar (real name: Kayleigh Rose Amstutz) received an enthusiastic reception when she played at the Lollapalooza festival in Chicago on Thursday.

Roan was reportedly slotted to perform on a smaller side stage at the festival, but due to the multitude of fans waiting for her performance, organizers decided to swap Roan's stage assignment with fellow pop singer Kesha, according to Rolling Stone magazine.

Lollapalooza shared a clip from Roan’s set on TikTok, which showed a massive crowd of concertgoers chanting to the singer’s dance-pop banger “Hot to Go!”

The 26-year-old later reflected on the performance and shared her gratitude with fans in an emotional Instagram post.

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“I was crying as I walked onstage at @lollapalooza because of the overwhelm of support,” Roan wrote on Saturday. “Thank you thank you thank you. I will remember this forever.”

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Chappell Roan’s Lollapalooza set may have broken attendance record

A spokesperson for Lollapalooza told CNN in a story published Monday that the turnout for Roan’s performance was unprecedented for the music festival.

“Chappell’s performance was the biggest daytime set we’ve ever seen,” the spokesperson said. “It was a magical moment added to Lolla’s DNA.”

Additional sources told the news network that Roan reportedly had “Lollapalooza’s biggest set of all time.” The number of attendees at Roan’s set has not been confirmed, but the festival spokesperson said 110,000 people attended Lollapalooza – which ran from Thursday through Sunday – each day.

USA TODAY has reached out to representatives for Lollapalooza and Roan for comment.

Roan’s Lollapalooza performance comes amid a meteoric breakthrough for the pop singer, who also performed at the Coachella Valley Music and Arts Festival in April and as an opening act on Olivia Rodrigo’s Guts World Tour.

Roan released her debut album, “The Rise and Fall of a Midwest Princess,” in September 2023. The synthpop LP peaked this week at No. 4 on the Billboard 200 chart.

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Her latest single, “Good Luck, Babe!”, scored her a Top 10 hit on the Billboard Hot 100, peaking at No. 8.

Contributing: Ed Masley and KiMi Robinson, USA TODAY; Greta Cross, Springfield News-Leader