Celebrity Birthdays: Janet Jackson Is Ageless

Ralph Tresvant and Kandi are also blowing out candles.

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Janet Jackson: May 16 - Miss Jackson — if you're nasty — is about to be newly divorce at 51. (Photo: Dave M. Benett/amfAR13/Getty Images for amfAR) 

Photo By Photo: Dave M. Benett/amfAR13/Getty Images for amfAR

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Emmitt Smith: May 15 - The former NFL running back and Dancing With the Stars champ is 48 and still quick on his feet. (Photo: Cindy Ord/Getty Images for Sirius XM)

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Ralph Tresvant: May 16 - The New Edition member turns 49 this week. (Photo: J. Countess/WireImage) 

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Tahj Mowry: May 17 - It's hard to believe the Baby Daddy star is 31. (Photo: Paul Archuleta/FilmMagic) 

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Tony Parker: May 17 - The NBA star dunked his way to 35. (Photo: Bertrand Rindoff Petroff/Getty Images) 

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Sugar Ray Leonard: May 17 - This boxing legend turns 61 this week. (Photo: Jesse Grant/Getty Images) 

Photo By Photo: Jesse Grant/Getty Images

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Kandi Burruss: May 17 - At 41, the reality star is reuniting with her former girl group, Xscape. (Photo: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images) 

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Karrueche Tran: May 17 - The 29-year-old has made a whole career on her own since her famous ex. (Photo: Paul Morigi/WireImage) 

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Hill Harper: May 17 - The acclaimed actor and author is now 51. (Photo: Taylor Hill/FilmMagic) 

Photo By Photo: Taylor Hill/FilmMagic

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Deitrick Haddon: May 17 - This 44-year-old preacher and singer is a respected force in the gospel music world. (Photo: Marcus Ingram/Getty Images) 

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Rochelle Aytes: May 17 - From Madea's Family Reunion to Mistresses, this 41-year-old actress is always on her grind. (Photo: Jerritt Clark/Getty Images)

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Taj Mahal: May 17 - This old school blues great hasn't stopped showcasing that soulful voice at 75. (Photo: Lester Cohen/WireImage) 

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Tina Fey: May 18 - Comedy wouldn't be the same without this 47-year-old force. (Photo: Monica Schipper/FilmMagic) 

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Reggie Jackson: May 18 - The baseball legend turns 71. (Photo: Araya Diaz/WireImage) 

Photo By Photo: Araya Diaz/WireImage

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Eric Bellinger: May 18 - Known for penning hits for Rihanna and Brandy, this 31-year-old has branched out on his own, releasing original music. (Photo: Leon Bennett/Getty Images) 

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Grace Jones: May 19 - Strangé may be 69, but she only gets better with age. (Photo: Vincent Sandoval/Getty Images) 

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Kim Zolciak: May 19 - This 39-year-old reality star is reportedly returning to the RHOA next season. (Photo: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images) 

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Sam Smith: May 19 - After all of his success, many forget that this British phenom is only 25. (Photo: Jason Merritt/Getty Images) 

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Yo Gotti: May 19 - Memphis's very own celebrates his 36th birthday. (Photo: Paul Archuleta/FilmMagic)

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Busta Rhymes: May 20 - The "Touch It" emcee celebrates his 45th birthday this week. (Photo: Michael Kovac/WireImage)

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Naturi Naughton: May 20 - At 33, this former 3LW member is gearing up to welcome her first child. (Photo: Tara Ziemba/Getty Images) 

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Cher: May 20 - With more than 50 years in the music game, it's hard to believe that this beauty is 71. (Photo: Dimitrios Kambouris/Getty Images)

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Mr. T: May 21 - This 65-year-old A-Team actor is a staple in American entertainment. (Photo: Jesse Grant/Getty Images) 

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Ronald Isley: May 21 - As the founding member of the Isley Brothers, this 76-year-old will always be a force in R&B. (Photo: Frederick M. Brown/Getty Images)