What it is: The procedure is a popular one among patients who want to turn their “outie” belly button into an “innie.” Technically called an umbilicoplasty, it can be done together with a tummy tuck.

How it works: The surgeon makes an incision inside the navel to change the appearance of the belly button. It is performed under local anesthesia, and there are usually no resulting scars.

Average cost: Up to $4,000

Source: The Daily Beast