Didn't know that. Doesn't it look like she has a vertical scar? I think it's just her stomach. Maybe it's a "fit" thing. I've never been into fitness. Which I'm now realizing needs to change.
Yeah I noticed the vertical line too, only thing I can think of is she either has lost a significant amount of weight, or has had a child, sometimes you get left with a line like that from your belly stretching so much. I have one like that below the belt (though it's so faded I'm the only one who notices it) from being prego, I swear I thought my stomach was gonna split right in half if that baby had gotten any bigger.