Kesha's knife-wielding Lollapalooza set was apparently much more real than anyone knew — including her.

The "Tik Tok" singer, 37, claimed in a post on X that a knife she performed with at Lollapalooza on Thursday was not a prop, even though she thought it was at the time.

"sooooo apparently the prop knife went missing and they replaced it with a real butcher knife stolen from the kitchen. and i didn't know," she wrote on X. "till now. so watch that again…."

USA TODAY has reached out to representatives for Kesha and Lollapalooza for more information.

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At Lollapalooza on Thursday, Kesha pulled out a large knife during her performance of "Backstabber." With several dancers performing around her, she waved the knife around and at one point pressed it to her leg. She also made stabbing motions with the knife and danced while holding it.

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When the song ended, the Grammy nominee tossed the knife behind her on stage.

It wasn't immediately clear who allegedly replaced the prop knife with a real knife. But in a follow-up post on X, Kesha shared a photo of herself holding the knife on stage and wrote, "new dating app profile pic."

She also alluded to the incident on Instagram by sharing a gallery of photos from the performance with a knife emoji in the caption.

Kesha's revelation that her prop knife was allegedly swapped out for a real knife shocked fans on social media, with one follower replying on X, "This is so unprofessional omfg."

"And if you had decided to improvise???" another fan wrote. "An inquiry should be put in with your team and someone should be held accountable that's sooooo bad."

Megan Thee Stallion and Chappell Roan were among the artists who also performed at Lollapalooza on Thursday, while Reneé Rapp, Victoria Monét, Blink-182 and more took the stage in the following days.