Kylie Jenner is using her killer curves to help endorse a beauty product.

The 17-year-old reality star Instagrammed a photo of her butt on Thursday, claiming that she uses a cream to help enhance her derriere (among other body parts).

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"I love sharing my beauty secrets with you guys and this is a favorite!" she wrote, alleging that the product helps her "maintain and accentuate" her curves.

While Kylie has admitted to getting cosmetic procedures in the past -- she confessed on an episode of Keeping Up With the Kardashians that she gets temporary lip fillers --, it appears she's now taking a more natural approach.

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In June, she revealed another secret to how she keeps her curves so curvy, and in turn debunked plastic surgery speculation.

"To whoever thinks I had breast implants, there's a whole lot of tape in here, holding these up," Kylie said in a Snapchat video, before reaching inside her dress to show off her taped breasts.

The youngest Jenner sister hasn't let critics of her curves stop her from posting scantily-clad pics on social media. In fact, she defended her scandalous images -- much like the one she posted of her butt -- when she spoke with ET.

"You are always going to have haters and negative comments… so we try not to read them," Kylie said. She added that she rarely has regrets with the pics she posts.

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