The baby boom of 2011 is well under way, with quite a few new babies already occupying the Hollywood nest! But the baby boom rolls on with even more celebrity mamas flaunting their bumps as they run their daily errands, show up on late-night talk shows, and attend star-studded events. Take a peek at these beautiful pregnant bellies and see if you can identify the mama-to-be behind them!

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Which mama-to-be looked like a goddess in her column dress this week?

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Which expectant mama showed off her bump on the red carpet?

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Which pregnant mama went for a conservative look while out for the night?

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Which expectant mama's bump was barely visible during a run to the drugstore?

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Which mama wore the popular sheer trend while out for lunch?

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Which mama-to-be was spotted waiting to board a flight?