For me she’s easily the hottest of the 2 sisters. But I know a certain person (Mike) will disagree with that!
It's not only that Gigi has the more interesting looking bellybutton, but the prettier facial structure as well, at least in my humble opinion. Although, she's always welcome to wear outfits like this as a throwback to the years when this was the normal way for female celebrities to dress. And the more protruding her bellybutton becomes, the better.
https://instagram.com/p/B1rV7YlgmO0/