Kim Zolciak-Biermann Is "Young AF" at 42 in the Tiniest Pink Bikini

The Don't Be Tardy mom flaunted her smokin' hot bod in an itty bitty stringy swimsuit.

By Chantel Morel May 20, 2020, 11:30 AM ET

What does one wear to celebrate their 42nd birthday? Well, if you're Kim Zolciak Biermann, the answer is quite simple: a cheeky bikini, of course. In honor of her special day, the Don't Be Tardy mama decided to share a steamy swimsuit snap on Instagram, showing just how sexy 42 can look in a swimsuit. Honestly, we wouldn't have expected anything less from the bikini queen.

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Posing by her incredible backyard pool, Kim flaunted her smokin' hot bod in a pink string two-piece swimsuit featuring a halter top and tiny, barely-there ruched bottoms. Ever the fashionista, Kim accessorized her swim look with a cute matching pink headband. "Thank you ALL for the birthday wishes! I can’t believe today I’m 42!! Like holy s--t.. that use to be sooo old to me when I was in my 20’s now I know it’s young AF," she captioned the May 19 post.

Kim's sexy bikini is from none other than her upcoming swimsuit brand, Salty K. (You've probably seen her new flirty designs on daughters Brielle and Ariana recently.)

View this post on Instagram
Thank you ALL for the birthday wishes! I canât believe today Iâm 42!! Like holy shit ..that use to be sooo old to me when I was in my 20âs now I know itâs young AF â¤ï¸ ð Iâm so thankful to see another year, to spend this time with my incredible husband , 6 wonderful children, my amazing friends, and so many others that bless my life everyday ðð¼ This last year hasnât been an easy one and I was so ready to see 2019 go, BUT Iâm also incredibly thankful for 2019 as this is the year I decided it was time to chase another dream of mine ðð¼ SWIMWEAR ð My love of the ocean and my passion for swimwear is how @saltykswim all started. Available June 1st! I canât wait ð Fun Fact: I love the ocean so much that I want my children, my grandchildren and future generations to enjoy it as much as we do now so when creating âSalty Kâ my fabrics were important to me. They are sustainability sourced and ethically produced. ð Even my tags are made from recycled paper. Canât wait to see what you think ð
A post shared by Kim Zolciak-Biermann (@kimzolciakbiermann) on May 19, 2020 at 10:09am PDT

"This last year hasn’t been an easy one and I was so ready to see 2019 go, BUT I’m also incredibly thankful for 2019 as this is the year I decided it was time to chase another dream of mine. SWIMWEAR." Kim wrote. The ATL entrepreneur, who also launched KAB Cosmetics along with Brielle and Ariana in 2019, revealed that her "love of the ocean" and "passion for swimwear" is how her new business venture all started.

Not only are Kim's bikini designs playful and sexy, but they are also eco-friendly. "Fun Fact: I love the ocean so much that I want my children, my grandchildren and future generations to enjoy it as much as we do now so when creating “Salty K” my fabrics were important to me. They are sustainability sourced and ethically produced. Even my tags are made from recycled paper. Can’t wait to see what you think," she shared.

Mark your calendar: Salty K will be available June 1.