Ready to feel old? The global phenomenon that made Britney Spears, Baby One More Time, was released twelve years ago. That's right Grandad.

But despite the sham marriage, the divorce, the real marriage, another divorce, the bitter custody battle, the shaved head, the harsh slide into insanity and the rehab, Britney still remains worthy of our lust. And get this, no female in the history of our 100 Sexiest Women in the World competition has polled more votes over those twelve years.

Go here to vote for Britters again this year or just meander your way through the following pages to see how she's evolved over the years.