By InStyle Staff
Updated Apr 28, 2012 @ 9:00 am
BEImages; A J Berliner

Two lovely Hollywood ladies are celebrating their birthdays today!  Jessica Alba turns 31, while Penelope Cruz blows out 38 candles. In honor of the occasion, take a look back at Jessica Alba's transformation in the gallery, from curly-haired teen actress to glamorous mother of two.

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