How exactly? Well, not only did the mother of three share a few sizzling bikini snaps on Instagram, she also said her "heart will always be at the beach."
And this isn't the first time that Kristin's two-piece moments have warmed up winter! Whether she's donning a bikini for an Uncommon James photo shoot or just wearing one on vacation, The Hills alum knows how to keep it spicy.
As she said in one December 2020 bikini pic, "Suns out buns out."
So, in honor of Kristin's birthday, we invite you to look at some of her best swimsuit snaps. You can find them by scrolling through the images below!
Now, the moment you've been waiting for, Kristin's best bikini moments:
Happy birthday, Kristin!
Binge past episodes of Very Cavallari on Peacock.
(E! and Peacock are both part of the NBCUniversal family).