How could you hide a belly piercing over the summer?

I usually just try and rinkle up my shirt by my bellybutton when i go around someone that i don't want to see it.... and if there's a family swimming occasion then i wear like a one peice of a two peice but one of those two peices that goes below your bellybutton. but even if you wear a tight shirt you cant see the peircing at all! unless you have a dangly ring but most the time they peirce it with a plain one so you should be good.