Heidi Klum celebrated her son Henry Samuel’s 20th birthday with a heartfelt family photo that offered a rare glimpse of all four of her children together. The black-and-white throwback snap featured Heidi and Seal’s children – Leni, Henry, Johan, and Lou – posing for a playful sibling portrait. All four kids struck fun poses, sticking out their tongues and smiling at the camera. The supermodel captioned the post: "We love you all so very much HENRY."

The blonde beauty has previously called her parenting style "European" and explained to People that she'd raised her kids to not only accept how open their mother was about her body, but to have the same appreciation for their own bodies. "I've always been very open with my body," she shared. "When I'm suntanning in the backyard, I

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