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Juvenile: March 25 - The former Hot Boy is fully grown at 38.(Photo: Brad Barket/PictureGroup)

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Aretha Franklin: March 25 - The Queen of Soul turns 71 years old.

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Jay Sean: March 26 - The British bad boy rapper turns 32.(Photo: Fernando Leon/PictureGroup)

Photo By Photo: Fernando Leon/PictureGroup

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Mariah Carey: March 27 - The R&B diva is looking better than ever at 43.(Photo: Stuart Wilson/Getty Images)

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Fergie: March 27 - The mother-to-be celebrates her 38th birthday.(Photo: Andrew H. Walker/Getty Images)

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Lady Gaga: March 28 - Mother Monster celebrates her 27th birthday. (Photo credit: Fafotos/Elevation/PictureGroup)

Photo By Fafotos/Elevation/PictureGroup

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MC Hammer: March 30 - The Oakland rapper is still "Too Legit to Quit" at 51.(Photo credit: Lucas Dawson/Getty Images)

Photo By Photo credit: Lucas Dawson/Getty Images

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Norah Jones: March 30 - The sultry songbird turns 34. (Photo credit: Darren Hauck/Getty Images)

Photo By Photo credit: Darren Hauck/Getty Images

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Tracy Chapman: March 30 - The "Give Me One Reason" singer celebrates her 49th birthday. (Photo credit: John Spellman/Retna Ltd.)

Photo By Photo credit: John Spellman/Retna Ltd.

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Celine Dion: March 30 - The Canadian hitmaker and mother of two turns 45. (Photo credit: Kevork Djansezian/Getty Images)

Photo By Photo credit: Kevork Djansezian/Getty Images

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Al Gore: March 31 - The former vice president and global warming activist turns 65. (Photo credit: Frazer Harrison/Getty Images)

Photo By Photo credit: Frazer Harrison/Getty Images