Rihanna is not the only hard-working pregnant mom

Like a pregnant Rihanna, 35, who premiered her baby bump during a wild Super Bowl halftime show, other moms-to-be with physically demanding jobs say they're in zero rush to go home and put their feet up.

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Rihanna is not the only hard-working pregnant mom

Rihanna is not the only hard-working pregnant mom

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Rihanna is not the only hard-working pregnant mom