As far as we're concerned, these stars have found the Fountain of Youth! Jay-Z, Jennifer Lopez and Gwen Stefani are all over 40, though they all have youthful glow that so many people try to get with expensive serums and surgeries. As far as they are concerned, you can take your Botox and shove it.

We could've also sworn that celebs like M.I.A. and Redfoo were all livin' it up in their 20s. Think again! All three are in their 30s, and we would never been any the wiser. Then there's Carly Rae Jepsen... If you told us she was 17, we would take your word for it, no questions asked -- but she certainly is not!

You can find out exactly how old all of these well-preserved celebs are in this list of Stars Who Are Older Than You Think. Go ahead, start getting your mind blown by clicking through below.

Jennifer Lopez
Birthday: July 24, 1969
Age: 44

Jennifer Lopez Older
Michael Buckner, Getty Images
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Jay-Z
Birthday: Dec. 4, 1969
Age: 43

Jay-Z Older
Larry Busacca, Getty Images
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Gwen Stefani
Birthday: Oct. 3, 1969
Age: 43

Gwen Stefani Older
John Sciulli, Getty Images
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Eminem
Birthday: Oct. 17, 1972
Age: 40

Eminem Older
Larry Busacca, Getty Images
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Mariah Carey
Birthday: March 7, 1970
Age: 43

Mariah Carey Older
Maury Phillips, Getty Images
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David Guetta
Birthday: Nov. 7, 1967
Age: 45

David Guetta Older
Ethan Miller, Getty Images
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M.I.A.
Birthday: July 18, 1975
Age: 38

MIA Older
Dimitrios Kambouris, Getty Images
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Redfoo of LMFAO
Birthday: Sept. 3, 1975
Age: 37

Redfoo LMFAO Older
Kevin Winter, Getty Images
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Carly Rae Jepsen
Birthday: Nov. 21, 1985
Age: 27

Carly Rae Jepsen Older
Ken Ishii, Getty Images
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Dr. Dre
Birthday: Feb. 18, 1965
Age: 48

Dr Dre Older
Isaac Brekken, Getty Images
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