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12/05/2013 09:50 am ET | Updated Jan 23, 2014

Kim Zolciak Tweets About Being A Size 4 Just 9 Days After Giving Birth To Twins

Kim Zolciak posed for a selfie and tweeted about being a size 4 just days after giving birth to twins.

On Wednesday (Dec. 4), Zolicak retweeted a photo posted by her daughter, Brielle, showing her slim physique in a black tank top and black sweatpants. The 35-year-old mother of six gave birth to twins nine days earlier on Nov. 25, Us Weekly noted.

Apparently, Zolicak is a size 4 and she credits her children for her figure.

Just three weeks ago, the reality star shared a photo of her blossomed belly with her Instagram followers. "Sooooo with all the request I finally decided to post My baby bump today!" she wrote. "The twins will here this month and we are soooo excited and I'm soooo over being pregnant! #countingdownthedays."

She welcomed daughter Kaia Rose and son Kane Ren last month. They are her third and fourth children with husband Kroy Biermann. The couple has two sons KJ, 2, and Kash, 12 months. She also has two daughters from previous relationships, Brielle, 16, and Ariana, 12.

Life with six children apparently isn't hard for the former "Real Housewives of Atlanta" star.

"They are doing awesome," she told photographers before heading into a doctor's office in Lawrenceville, Ga., last week, according to People magazine. "A lot easier than I thought, so far ... but don't speak too soon right?"

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