Beyonce dropped a whopping 60 pounds after giving birth to Blue Ivy Carter -- that's according to the singer herself. Us Weekly reports that Bey told the crowds at her Memorial Day weekend show in Atlantic City -- her first time performing since giving birth on January 7 -- that she worked hard to get her post-baby body back.

"Y'all have no idea how hard I worked. I had to lose 60 pounds!" Beyonce reportedly belted out to the audience. "They had me on that treadmill -- I ate lettuce!"

The 30-year-old, 5-foot-7 Beyonce should serve as good inspiration to a fellow female star now in a similar position: Jessica Simpson. After giving birth to daughter Maxwell Drew on May 1, Simpson has declared she's ready to shed the pounds. "For me, I really want to do something that is a lifestyle, because in the past, I've been known to yo-yo diet," the 31-year-old "Fashion Star" judge told People magazine for its latest cover story.

It looks as if the pressure is on: Simpson reportedly inked a $3 million deal with Weight Watchers to slim down while serving as their spokesperson.

Check out other celebrity post-baby bodies:

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  • Malin Akerman

  • Jennifer Nettles

  • Claire Danes

    (Getty)

  • Snooki

    (Getty, Us Weekly)

  • Megan Fox

    (AKM-GSI ,x17)

  • Reese Witherspoon

    (Getty, FameFlynet)

  • Kourtney Kardashian

    (Us Weekly)

  • Hilary Duff

    (Getty, FameFlynet)

  • Beyonce

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  • Jenna Fischer

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  • Jane Krakowski

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  • Tori Spelling

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  • Natalie Portman

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  • Pink

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  • Victoria Beckham

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  • Rachel Zoe

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  • Kate Hudson

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  • Jessica Alba

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  • Mariah Carey

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  • Alicia Silverstone

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  • Alyssa Milano

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  • Miranda Kerr

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  • Emily Deschanel

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  • Penelope Cruz

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  • January Jones

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