Another slightly-mangled-thanks-to-multiple-pregnancies bellybutton... but at least it's only gone as far as an in-betweenie. :-X
And yet, one of your favorite celebrities is Katharine McPhee, who has a naturally "mangled" bellybutton. :-X
... it's not "mangled" because it's still in its natural state (still, I dread the day she gets knocked up, because I'm strongly convinced hers will lose a good deal of its complexity ... and *gasp* maybe even become a full-blown outie :-\). With over 7 billion of us now on the planet, humans couldn't be further from an endangered species. I wish so many people would stop treating procreation as some sort of moral obligation. :-X
You can thank the beautiful trick of sex being the method used for procreation. If there wasn't any pleasure to the baby making process, I doubt the human race would have lasted this long. That and it is taught to us at the earliest age possible that procreation is a life goal and that our lives are incomplete if we don't achieve it. Frankly, I don't believe in such an ideology.
But if said inbetweenie is natural or a result of childbirth is irrelevant. It's still an unique bellybutton, and a middle ground that can please both innie and outie lovers, so I don't see a reason to get bent out of shape over it.