Although there is historical evidence of decoration of the navel, the jewelry used today is quite a modern invention. It is most often used by women as shiny dangling jewels attract attention to the stomach, widely regarded as an erogenous zone. Most people consider belly button rings extremely sexy. Even celebrities got involved in the navel piercing fashion. Britney Spears, Beyonce, Paris Hilton, Lindsay Lohan, Christina Aguilera, Gisele Bundchen and Keira Knightley each have one. The main advantage of navel jewelry is that it's easy to hide if needed, at work for example, and can be exposed only at those particular times you want to create a sexy image.