Guess the Bundled Up Baby!

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Atlas Tupper!

Anne Heche (in NYC on Nov. 9, 2009) and James Tupper welcomed their son in March 2009.

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This bouncing baby is named after a New York City borough.

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Bronx Mowgli Wentz!

The tot -- born Nov. 20, 2008 to Ashlee Simpson-Wentz and Pete Wentz -- ran errands with dad in NYC Dec. 28, 2009.

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This little rocker splits his time stateside and across the pond.

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Zuma Nesta Rock Rossdale!

Gwen Stefani and Gavin Rossdale (at Locanda Locatelli in London on Dec. 19, 2009) welcomed their second son on Aug. 21, 2008.

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This mini catwalker is the proud big sister to two little brothers and a sister.

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Leni Klum Samuel!

The 5-year-old went ice skating with mom Heidi Klum in Aspen, Colo. Dec. 28, 2009.

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This little lady smells as sweet as a rose.

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Matilda Rose Ledger!

The 4-year-old hung out with mom Michelle Williams in their Brooklyn, New York neighborhood Dec. 14, 2009.

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This two-year-old munchkin (shopping in L.A. Dec. 30, 2009) inspires his mom's music.

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Max Bratman!

Christina Aguilera (husband is Jordan Bratman) says her fourth album, Bionic, "is just about the future -- my son in my life, motivating me to want to play and have fun."

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These sisters have a passport full of stamps!

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Shiloh and Zahara Jolie-Pitt

Shiloh and Zahara Jolie-Pitt (3 and 5 respectively) grabbed a bite to eat in New York City with their parents, Brad Pitt and Angelina Jolie, and brothers Pax and Maddox on Dec. 20, 2009.