Kim Zolciak has never been shy about showing her baby bump to the world. And she makes no exception to her current extra-large belly which is carrying husband Kroy Biermann's twins.

The "Don't be Tardy..." star is a fan of Instagram selfie pictures of herself featuring her tummy. In her latest post the mother of four soon to be six took off her top to show everyone her bare stomach.

Wearing only a black bra and sweatpants, Zolciak struck pose in front of the mirror exposing her expanding pregnancy curves.

Attached the photo was the caption via Twitter, "Wiggin it to Walmart this morning!!! This belly is soooo heavy!!!! Not too much longer!! #twins #thankgodforsweats."

According to E! News in less than 24 hours, the picture was liked more than 21,000 times and received more than 700 comments.

The Bravo reality star has posted several baby bump pictures to her Instagram account and back in August told the celebrity news site about her utter surprise when she found out she was expecting not one baby but two.

The 35-year-old told E! News, "I was completely shocked. I had no idea. It was a natural conception, but twins do run in the family, so I guess I shouldn't have been surprised."

She said in disbelief, "I can't believe I am going to be a mom to six children. It's going to be very busy but it's a dream come true."

The former "Real Housewives of Atlanta" stars is already mother to sons Kroy Jr., 2, and Kash, 1, while her Atlanta Falcons NFL player husband legally adopted her daughters Brielle, 16, and Ariana, 12, who Zolciak had from previous relationships.

On September 7 the excited mom tweeted, "I still can't believe that God blessed me w/ 2 more bundles of joy!"

She went on to write, "It's truly amazing to see the babies on ultrasound! Seeing 2 is insane!"