Photo: Jim Spellman/WireImage/Gary Gershoff/WireImage/Kevin Mazur/WireImage
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4. A Hollywood baby boom is about to ensue.
Blake Lively, Jessica Biel, and Anne Hathaway all tied the knot in 2012. Since most Hollywood stars don't wait long between marriage and carriage, we predict these leading ladies will have buns in the oven before 2013 is through. Can you say, "Most epic maternity fashion face-off EVER"?