1. Because Keira Knightley wore just jeans and what looks like a bandage to the Pirates of the Caribbean premiere.
2. Because Britney hacked the bottom of this jumper off, specifically to show off her belly button.
3. Because no one saw Gwen Stefani with a fully covered torso until 2004.
4. Because Christina couldn't leave the house without making sure her navel was on show.
5. Because in 2003 even classy looks, like this white suit Jessica Simpson rocked, had to flash a bit of belly button.
6. Because you didn't just have to get your belly button out, you could show off your belly bling though some mesh.
7. Because Mischa Barton looks very chic in this coat look, but she also made sure her navel was easily visible.
8. Because Alicia Keys managed to wear so many clothes, but also you can see her belly button.
9. Because Katie Price (aka Jordan) demonstrated two ways to frame the belly button, one for day and one for night.
10. Because Rachel Stevens knew the importance of belt buckles and knit wear, when it came to showing some skin.
11. Because Lindsay Lohan managed to wear a dress and jeans AND still show off her brand new belly button piercing.
12. Because Tara Reid wore some excellent midriff jewellery.
13. Because Mariah Carey wore the almost exact same look two days apart, because it looked great both times.
She bought those boots in both colours.