Hot Mamas: Kate Middleton Shows Some Leg, Blake Lively Shows Some Cleavage

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It's a royal pregnant fashion battle, but who will take the crown? Blake Lively with her plunging neckline and belly-huggying dress or Kate Middleton with her more subdued, modest look?

First up, we have the Duchess of Cambridge who is expecting her second child in April.

The barely showing royal arrived at the Natural History Museum in London for the Wildlife Photographer of The Year Awards Ceremony in this baby blue Jenny Packham gown. She even showed off a little leg. Scandal!

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Keeping it classy in beige heels and a matching clutch, the 32-year-old looks modest and wrapped up on top. Unlike her Hollywood counterpart Blake Lively who put the goods on full display.

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PHOTOS: Kate Middleton's Best Royal Style Statements

The 27-year-old Gossip Girl actress dared to bare in a plunging sparkle neckline at the 2014 Angel Ball in New York City last night.

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The yellow Gucci dress shows off her baby bump that has been covered in color with a rainbow poncho or cute floral dresses. Lively is expecting with her actor husband Ryan Reynolds, and the two could not look happier.

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PHOTOS: Ryan Reynolds and More Celeb Dad Styles

Both Kate and Blake are looking pretty fancy so which style do you like better? Tweet us your thoughts using the #ETnow hashtag.

With a recent Hollywood baby boom, there have been a lot of great pregnancy styles. Lucky Magazine's Eva Chen weighs in to tell us some of her favorites in the video below.