Go big or go home!

Clearly, those are words Kim Zolciak lives by -- as she showed off both her big hair and bigger baby bump this morning on Instagram.

"Wiggin it to Walmart this morning!!! This belly is soooo heavy!!!! Not too much longer!! #twins #thankgodforsweats," the former "Real Housewives of Atlanta" star posted along with the pic.

In August, the reality star announced she and husband Kroy Biermann are expecting twins. The couple already have two sons together and Kim also has two daughters from previous relationships, Brielle and Ariana, whom Kroy legally adopted this summer.

Zolciak has been very public with this pregnancy -- tweeting bikini photos and other revealing shots from the gym as her stomach continues to grow.

With 6 kids running around, the Zolciak-Biermann house is about to get very, very hectic!  

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