If you were alive in the late nineties and early aughts, you're more than familiar with Britney Spears. You probably know all the lyrics (and dance moves) to "Baby One More Time," you most likely still believe that Justin and Britney were the best couple ever, and of course, you've memorized all the singer's most iconic looks.
Today, in celebration Spears' 34th birthday (Dec.2), we're taking a look at her most memorable outfits to date. Between her on-stage costumes and her red carpet moments, this lady has had some looks for the books throughout her 16-year career in the limelight.
1999

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In concert.
1999

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Performing on the Tonight Show with Jay Leno.
2000

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At the American Music Awards.
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2000

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At the MTV Video Music Awards.
2000

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At the Billboard Music Awards.
2000

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At the Grammy Awards.
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2001

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With Justin Timberlake at the American Music Awards.
2001

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At MTV Video Music Awards.
2002

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At the MTV Video Music Awards.
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2003

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At the MTV Video Music Awards.
2003

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At MTV Bash.
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