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Jessica Simpson

Theo Wargo/WireImage

Happy birthday, Jessica Simpson!

To honor the babe's big 3-0 , we're celebrating in style—with a gallery of the star's fashion flashbacks.

From mom jeans to disco ball dresses to bright frocks, it's never a dull moment for Jess on the red carpet. Check out the blond beauty's fashion highs and lows in our brand-new Fashion Spotlight: Jessica Simpson gallery!