Following Chilichiki's lead here:
I'm 30 weeks along now, but HUGE as I'm carrying 3 babies -- much bigger than I was with my dd at 41 weeks -- and my belly button has popped (see pic in the Ladies who took a little bit longer to get pregnant thread). My tank tops ride up, leaving half the belly exposed all day, but I have one zipper fleece that still zips up over my girth in case I get cold or have company (not leaving the house much these days). Problem is, the belly grows on a daily basis, and one day (day-before-yesterday, to be exact, after a very early Thanksgiving celebration) the zipper didn't quite clear the outie-belly-button. You can imagine what happened. Think the first part of Something About Mary. Wow, now I know why boys prefer button flies. Before you cringe too much, I should tell you that it really was just a graze, but still enough to draw a little blood and a blood-curdling scream. Watch out for those popping belly buttons, ladies!