Chappell Roan shared an important PSA for her crowd in Chicago — and one potential listener in particular.

During her performance at Lollapalooza on Thursday, Aug. 1, the rising 26-year-old pop star gave a special shoutout to an ex, before diving into track “My Kink Is Karma.”

“I dedicate this song to my ex who was bragging that they dated me at the bar in my hometown,” Roan (born Kayleigh Amstutz) said, per video shared to X (formerly Twitter). “This is a message for your fiancée: You should break up!”

The moment, which was met with plenty of cheering, came toward the end of the musician’s 13-track set. Her performance was topped off with a wrestling bodysuit and Luchador mask, all the hits including “Good Luck, Babe” and “Pink Pony Club,” and of course, a sea of fans taking part in her “Hot to Go!” dance.

Other Thursday performances at Lollapalooza, which was sponsored by Hennessy, included Megan Thee Stallion, Hozier, Kesha and Tyla. The festival, taking place at Chicago’s Grant Park, will continue on through Sunday, with additional weekend performances from Blink-182, Future and Metro Boomin, The Killers and more.

Attendees at the festival were able to enjoy Hennessy as the festival’s official first Cognac partner.

Roan, who released her debut album The Rise and Fall of a Midwest Princess in September 2023, has only seen her star rise since the album came out — as she continues to command massive crowds at festivals this summer. She previously spoke with PEOPLE around the release of her album in 2023, when she shared that her project “feels like a party.”

“I think that people just want to be happy and reflect, sing, dance and dress up, and feel free,” she said at the time. “The project gives people an opportunity to express themselves without judgment and freedom to discover themselves in the same way that I feel like the project allows me to discover myself.”

Among her many festival performances, in which she opts to get creative with her on-stage attire, Roan stepped out at the 2024 Governors Ball in June wearing a Statue of Liberty get-up, in which she rocked green body paint and a crown headpiece. At the time, Roan told the crowd she was “in drag” as the monument (a.k.a. the “biggest queen of them all”), before quoting the poem etched onto the statue.

“Give me your tired, your poor, your huddled masses, yearning to breathe free,” she said, per a video shared on TikTok by Rolling Stone. “That means freedom in trans rights, that means freedom in women’s rights…and it especially means freedom for all oppressed people in occupied territories.”

Ahead of her latest performance in Chicago, Roan stepped out for a gig at The Vic Theatre as a part of the Lollapalooza Aftershows series, in which she took on a Marie Antoinette-inspired look with a regal corset ball gown, Victorian makeup and a white hairpiece.

Back in June, Roan opened up on TikTok about her recent rise to pop-stardom, and how other artists have reached out to lend a hand as she navigates it all. At the time, she described “the past couple of weeks” as “cuckoo.”

“But what’s so reassuring and so f—ing sick is — the pop girls that you and I have loved our whole lives or have been f—ing stans [of] the past two or three years — a lot of them have reached out and are so supportive and girl’s girls,” she said, adding that she was impressed by the way “the girls” are “supporting each other in the pop industry.”

“To have people I look up to reach out and offer like a friend or help, I don’t know, it’s just sick and it makes me believe in the world,” Roan said.