Reese Witherspoon, Jennifer Aniston, and More Stars Whose Faces Haven't Changed in Years

Scientists are still scrambling to invent the fountain of youth, but it looks like these celebs have already discovered it. Reese Witherspoon and Mario Lopez both have faces that haven't aged in years, and whatever their secret is, they're not telling!

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Click through the gallery to see which celebs are aging better than you thought.