Came here to ask the same. So instead I googled "missing belly button". Number one result looks like the same girl. The website is clickbait bullshit, so I'm not going to link it, but after scrolling through a 10 page fucking slideshow I found: "It does look like [she may have had] an umbilical hernia as a child that was either fixed or not fixed, which can distort the belly button," said Dr. Matthew Schulman, a plastic surgeon at Manhattan's Mount Sinai Medical Center, as reported in the Huffington Post.