Mackenzie Douthit is firing back against weight critics on Instagram.

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After being called "pregnant" in the comment section of a photo shared over the weekend, the Teen Mom 3 star shot back, sharing a second photo with fans, which put her killer post-baby body on display.

"Since everyone's saying I look pregnant in the last pic I thought I'd post another pic of my gross manly 95 pound body," Douthit wrote on Instagram on Monday. "#yourwelcome."

In the months since she gave birth to her second child, Douthit has been hitting the gym hard and eating healthy.

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Last week, Douthit spoke of her weight loss on Twitter, telling fans she was just 60 pounds heavier than her 2-year-old son.

"Me and Gannon are 60 pounds difference and me and josh are 78... like how," she wrote.

Douthit and her husband, Josh McKee, were featured on MTV's 16 & Pregnant and Teen Mom 3. On 16 & Pregnant, they were seen welcoming their first child, son Gannon. Throughout their time on Teen Mom 3, Douthit and McKee struggled within their marriage, but months later, they made amends and in 2013, they tied the knot. In early 2014, they welcomed their second child, a daughter.

Teen Mom 3 was canceled by MTV earlier this year after just one season.

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Mackenzie douthit, Teen Mom 3, Reality TV, MTV