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We're only five months into 2011, but a slew of Hollywood starlets have already taken on major roles: being new moms! Celebs like Penelope Cruz and Elizabeth Banks (right) celebrated the birth of their babies this year, becoming proud first-time parents, and Mariah Carey got double the trouble with her first pregnancy when she gave birth to twins, Moroccan and Monroe. Meanwhile, other stylish moms like Nicole Kidman and Mariska Hargitay added to their growing families. Click through the gallery to see all the hot new moms in Hollywood!
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