While many of our favorite celebs are blessed with great genes, looking fabulous while aging requires paying attention to diet, exercise, and sticking to a beauty regimen that works for you.
I'm not smart - I'm 41! You're 17! - Julia Roberts to niece Emma Roberts
Click through the gallery to see which celebs have maintained a youthful appearance, and exactly how they did it.
Which celebrities haven't been so careful about maintaining that youthful glow? Find out here!
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