Chappell Roan is “unable to perform” at the All Things Go Music Festival, where she was slated to sing in Sunday’s show at Merriweather Post Pavilion, the pop singer posted Friday on Instagram.

She also will not perform Saturday, when she is scheduled to headline the New York City run of the festival at Forest Hills Stadium in Queens.

The event, which is celebrating its 10th anniversary, is sold out at Merriweather in Columbia.

“Things have gotten overwhelming over the past few weeks and I am really feeling it,”the 26-year-old singer posted Friday at noon.

“I feel pressures to prioritize a lot of things right now and I need a few days to prioritize health. I want to be present when I perform and give the best shows possible,” she said.

The festival said in a statement on X, formerly Twitter, that it was “heartbroken” of the news but “strongly supports artists prioritizing their well-being.”

“We ask our community to rally around Chappell Roan with love and understanding,” the festival’s statement said. “Let’s continue to show the world that music fans support not just the art, but the artists themselves.”

The festival would have been the “Pink Pony Club” singer’s first performance in Maryland since Roan, born Kayleigh Amstutz, skyrocketed to fame following the release of her debut studio album “The Rise and Fall of a Midwest Princess” last year.

Her quick rise to global prominence has been marked by difficult conversations with her fans. In August, she posted a message on her Instagram affirming her need “to draw lines and set boundaries” with her fans, citing “predatory behavior,” including “nonconsensual physical and social interactions.”

“Please stop touching me. Please stop being weird to my family and friends. Please stop assuming things about me,” Roan wrote in the post.

The cancellation of Sunday’s show comes two days after she posted a lengthy video statement on TikTok responding to criticism that she would not endorse Vice President Kamala Harris, the Democratic presidential nominee in the general election.

In that video, Roan made clear that she was voting for Harris, but decried “problems on both sides,” adding that she was “done talking about” the difference between endorsing and voting for a candidate.