Jessie James Decker flaunts toned post-baby body in neon bikini

Jessie James Decker gets slammed by fans for drinking while breastfeeding

Country music singer Jessie James Decker posted a picture to Instagram of her breastfeeding her newborn son with a glass of what appears to be wine. While some fans supported the mother of three, many slammed the star for her behavior.

Jessie James Decker's fans can't believe how toned the country singer's body is less than a year after giving birth to her third child.

The country singer posted several photos on Instagram on Monday showing off her post-baby body while on her lavish trip to Mexico’s Cabo San Lucas. Decker is pictured standing next to husband and former NFL player Eric Decker wearing matching neon bathing suits and enjoying time with other friends that included New England Patriots player Rob Gronkowski and “Bachelor” alum Shawn Booth.

Social media followers especially noticed Decker’s impressive body following the birth of her son Forrest on March 31.

“Seriously she is body goals!!” one user wrote, while another person commented, “How does she look like this after THREE CHILDREN life is not fair.”

“How does she look like this after three kids. I look like a troll after one,” a fan said.

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Another person chimed in, “How is your stomach so flat when your baby isn't even a year old yet?!”

“DO YOU SEE HER BODY AFTER THREE CHILDREN? AH-MAZ-ING,” Another wrote.

Decker previously opened about her workout and diet regimen after giving birth to her third child with the former NFL player. The 30-year-old recently revealed she lost 25 pounds on the South Beach Diet — which focuses on eating high-fiber, low-glycemic carbohydrates, unsaturated fats and lean protein — and gained muscle in parts of her body.

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“I think a lot of women obsess with the word ‘skinny.’ And if that’s your goal, that’s fine,” Decker told Us Weekly on Tuesday. “For me, I feel good being healthy and feeling fit. I prefer to have a little extra meat on my bones and muscle tone so that I have the strength to pick up and play with my kids.”

Decker also has a daughter Vivianne, 4, and son Eric, 3.