Britney Spears
Credit: WENN; Time Inc Digital Studio

Britney Spears turns 30 today! To help you get in the Brit Brit birthday spirit, we've dropped one of her best hairstyles in our Hollywood Makeover Tool, which means now you can see what you would look like with the Femme Fatale's sunny, wavy 'do. Just click the link below to upload your photo and get started, then share your results on Facebook and Twitter. And should you choose to blast "Womanizer" in the background while you're perfecting your virtual look, we'll never know!