Britney Spears' 30th birthday is this week, and we've decided to mark the occasion with a collection of 30 of the pop legend's most striking photos, including rare or long-forgotten shots culled from photoshoots, advertisements and more. In the 13 years since "...Baby One More Time" embedded itself in our brains, the Femme Fetale has again and again proved that she (along with producers and songwriters like Max Martin) can rise to the challenge of pushing pop music forward. A dubstep breakdown? Oh yes she did. Spin through our gallery and reflect on the pop wizardry that she has wrought (and how good she looked doing it). It would be criminal not to offer credit where it's due.