if you really want to know, go to a local tattoo parlor that you trust and BEFORE you ask to get it done talk to the tech and see if they are willing to pierce you and what the pros and cons are and such.
From my own experience (in Washington state) I've NEVER seen a piercer willing to consent to any piercings (other than standard earlobe) for people under 15, even with parental consent. I'm sure there are some shady people out there that would be willing to do it for you, but it's probably best to wait anyway--piercings are a semi-permanent addition to your body and require daily care (at least for the first several weeks) and at 12 you're probably not ready to deal with it.
Body Piercing Guidelines or "I want a piercing, now what"
A belly piercing is a piercing on the belly button. Where your belly button might go in or out, it is the slight arch you get just above it. it is a piercing through that area. depending on how your belly button is formed. Search google for images.
The pain of the belly button piercing should subside after a week.
Its the jewelry that goes into a belly button piercing.
Yes you still can.
A belly button ring is a body piercing placed in a cauterized area of the belly button.
Your belly button piercing hurts more then a normal ear piercing your belly button piercing is more sensitive then a ear. :]
Belly button.
A lip piercing hurts more than a belly button piercing, but neither hurt much at all. Getting your lip feels like you accidentally bit it haha and you can barely feel a belly button piercing.
Bill has a setum piercing but there are rumors about a belly button one.
No katy perry does not have a belly Button piercing I have seen a pic of her in a bikini so no she doesn't have one
No
She sure does.