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Taylor Swift: December 13 - The country singer celebrates her 22nd birthday.   (Photo: Frederick Breedon IV/Getty Images)

Photo By Photo: Frederick Breedon IV/Getty Images

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Jamie Foxx: December 13 - The R&B singer and Academy Award-winning actor turns 44. (Photo: Gregg DeGuire/PictureGroup)

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William “Refrigerator” Perry: December 16 - The former NFL player celebrates his 49th birthday.  (Photo: Frazer Harrison/Getty Images)

Photo By Photo: Frazer Harrison/Getty Images

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Lalah Hathaway: December 16 - The singer and actress turns 43. (Photo: Frederick M. Brown/Getty Images)

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Michael McCary: December 16 - The former Boyz II Men singer celebrates his 40th birthday. (Photo: Chris Hondros/Newsmakers/GettyImages)

Photo By Photo: Chris Hondros/Newsmakers

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Flo Rida: December 16 - The "'Right Round" rapper turns 32.  (Photo: Ethan Miller/Getty Images)

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Sean Patrick Thomas: December 17 - The actor celebrates his 41st birthday. (Photo: Valerie Macon/Getty Images)

Photo By Photo: Valerie Macon/Getty Images

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Manny Pacquiao: December 17 - The boxing champ turns 33. (Photo: Ethan Miller/Getty Images)

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DMX: December 18 - Earl Simmons celebrates his 41st birthday. (Photo:WENN.com)

Photo By WENN.com

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Brad Pitt: December 18 - The actor and father of six turns 48. (Photo: GettyImages)

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Steven Spielberg: December 18 - The blockbuster director celebrates his 65th birthday. (Photo: Pascal Le Segretain/Getty Images)

Photo By Photo: Pascal Le Segretain/Getty Images

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Rah Digga: December 18 - The first lady of Flipmode turns 39.  (Photo: Terrence Jennings/Picturegroup)

Photo By Photo: Terrence Jennings/Picturegroup

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Christina Aguilera: December 18 - The singer and The Voice judge celebrates her 31st birthday. (Photo: REUTERS/Tobias Schwarz /Landov)

Photo By Photo credit: REUTERS/Tobias Schwarz /Landov