Urban Decay's must-have primer

Don't let the kitschy genie in a bottle design fool you, Urban Decay's Eyeshadow Primer means serious business. Chock full of silicon, it goes on nice and smooth and dries almost immediately -- though I have to be sure to not use to much as the applicator tends to gunk a bunch out at once. I smooth it out and then brush on my fave eyeshadows.

Then comes the test. During your lunch break, head to ladies room and check yourself out in the mirror. Eye shadow just as divine and sparkly as it was that morning? Check. No creasing? Double check!

It's one of those things that I didn't even know I needed, but after my first use I don't know how I ever lived without it. And I'm not the only one. Not only has it won Sephora's best of 2008 award, the editors at TotalBeauty also gave it a 9.5. Get it at Sephora.