More and more celebrities are opening up about the work they’ve had done, helping to destigmatize plastic surgery and cosmetic treatments like injectables. Amy Schumer recently shared that she got liposuction, Chrissy Teigen talked about her buccal fat removal surgery, and Khloe Kardashian revealed that she had a nose job.

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But it’s not always success stories being shared by the stars; some have also been revealing how certain treatments left them physically ill or botched. Supermodel Linda Evangelista, for example, recently opened up about how a series of CoolSculpting treatments left her “permanently deformed” and “brutally disfigured.”

The latest celebrity to join the conversation is Britney Spears. In a candid share on Instagram, the popstar admitted that she was considering Botox, pointing out some subtle lines on her forehead. “I’m really debating on getting Botox,” she wrote, but then went on to explain how past Botox injections left her looking a little weird and so she was hesitant to do it again.

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“The last time I did it my eyebrow was raised like the funny girl in the movie ‘Just Go With It,'” Spears wrote. (She is referring to Rachel Dratch’s character who had comically high eyebrows in the 2011 Adam Sandler movie.) “Sounds funny but it actually wasn’t !!!”

In her post, Spears explained that the Botox injections resulted in her eyebrow being “raised” for three weeks, adding, “it wouldn’t come down, it stayed up there.” In fact, the resulting effect was so bad, she feared it was permanent. Luckily for Spears, however, her eyebrows eventually returned to normal.

Generally speaking, Botox is considered a minimally-invasive procedure for lessening the look of fine lines and wrinkles, and when performed correctly, there is very little to worry about. But all cosmetic procedures come with some risk and a bad session can leave you with less than stellar results.

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As Annie Chiu, MD, board certified dermatologist and founder of The Derm Institute, explained to Byrdie, “The most concerning [side effect] for patients is typically a dropped brow or eyelid, either on one side or both.” This occurs if the Botox is placed too low or too much is injected in the eyebrows.

Another way Botox injections can go awry is if “some of your muscles prove stronger than others, causing asymmetry,” Dr. Chiu added. It sounds like this is what happened to Spears, who recalled one brow being raised higher than the other. The good news in this case is that the asymmetry typically settles on its own in a few weeks, and if not, it’s easy to adjust by adding a little more.

As for whether or not she is seriously considering getting Botox again, Spears finished her post by writing, “Anyways just happy to be here as in PRESENT,” saying she’s currently focused on “cherishing moments and most of all, getting strong spiritually.”

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