Wanna get Keira Knightley's smokey eyes, Jessica Alba's long lashes, Lauren Conrad's pretty pucker, and Sophia Bush's healthy glow? Well, guess what? We've gathered together their secret beauty weapons -- not to mention tons of other star faves, too! From fab make-up to sexy perfumes, find out what beauty products celebs love, and how you can win them!

GOING BACK TO SCHOOL WAS NEVER SO FUN! KEEP CLICKING TO SEE WHAT BEAUTY ITEMS CELEBS CAN'T LIVE WITHOUT -- AND ENTER TO WIN!

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