Credit: Juan Naharro Gimenez/WireImage

Bar Refaeli is glowing—literally.

The Israeli model is currently expecting her second child with husband Adi Ezra, and she's not shy about showing off her growing tummy. The 31-year-old beauty took to Instagram to share a snap of her bare baby bump in a sun-filled photo that features her rocking a white and gold bikini. The mother-to-be lounges on a wooden deck in the 'gram as she smiles down at her belly.

"Days like these ☀ Shabbat Shalom," she wrote alongside the picture.

VIDEO: Chic Celebrity Maternity Fashion

But this isn't the first time Refaeli has flaunted her bare bump. A few weeks ago she posted an image of herself in a green two-piece suit, which she captioned: "Baby wanted some vitamin D." The star, who is already mom to a 9-month-old daughter named Liv, also rocked a bikini several times during her first pregnancy.

Check out more celebs wearing swimsuits in our gallery.