Kim Kardashian has finally revealed the mystery behind her famous ass-ets — but it's not what we think!

On Monday, the reality star admitted via livestream to receiving butt injections. The injections weren't intended to plump her insanely-famous booty, but to treat her psoriasis.

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“I went to go get a cortisone shot in my butt,” the KUWTK star confessed. “One of my neighbors was a dermatologist at Cedars. I go in there and he’s like, ‘There’s a one in a billion chance that you will get a huge indent in your butt.’ Of course I get a huge indent on my butt.”

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Due to the visible indent on her butt, fans quickly accused the reality star of receiving implants, “There is a picture of me in Miami wearing an electric blue dress, and another picture of me walking down Robertson,” she continued. “You see the indent. And I think that’s when the rumors started: ‘She’s had implants.’”

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Kim has since denied the rumors, and still receives injections to treat her ongoing skin condition.

“Every few years I get a cortisone shot,” she continued. “I just got one as my psoriasis was so bad in Vegas.”