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Celeb bump day: Christina Aguilera, Hayden Panettiere, Kristen Bell, Rachel Bilson

Kim Grundy is a mom, writer, expert laundry folder and sandwich maker, not necessarily in that order. Raised in Oklahoma, she is now a West Coast gal and lives in California with her husband and two sons, along with one dog, two fish (oo...

Pregnant celebrity photo gallery

Happy Wednesday Hump Day! Pregnant Christina Aguilera flaunted her baby bump while celebrating the first day of summer, while Hayden Panettiere showed off her new curves in a crop top. Newly pregnant star Kristen Bell looked radiant on the red carpet, as did Rachel Bilson, who bared her baby bump one more time before heading home from vacation. Kelly Rowland rounds out our list of the cutest pregnant celebrities of the week.

Hayden Panettiere

Pregnant actress Hayden Panettiere joked about her baby bump as she posted this picture of herself in a black crop top while in Italy with her fiancé Wladimir Klitschko. The 24-year-old Nashville star is expecting her first child with the heavyweight boxer.

This tweet is the first time that the actress has publicly acknowledged her pregnancy since the baby news recently broke.

Check out pregnant Panettiere in a swimsuit here >>

She did hint about her plans to start a family, telling Glamour last May that she felt like she was "born to be a mother."

"Sometimes people speak about [having kids] like, 'Your life ends — you're never going to be able to do anything again!' And I'm like, 'What are you talking about?' Motherhood is the most beautiful, exciting thing, and there's nothing that I feel like I can't accomplish while having children in my life," she said.

Next up: Pregnant Rachel Bilson flaunts her bump in a colorful bikini

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