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Pink & Carey Hart

Willow Sage, June 2

• She tweeted that she's traded "whiskey, tears and cigarettes" for "snot, tears and the color of poop," but the singer, 32, and her motocross-champ husband, 36, wouldn't change a thing about their lives as new parents. "I could sit and watch paint dry as long as she was in my arms," says Pink. "It's a beautiful time."

Mariah Carey & Nick Cannon

Monroe & Moroccan, April 30

The timing couldn't have been more perfect for Carey, 42, and Cannon, 31, who celebrated their third wedding anniversary by welcoming their twins, nicknamed "Roc" and "Roe." "They are the most incredible gifts we could ever have imagined," tweeted Carey.

Jewel

Kase Townes, July 11

The singer and her husband, former rodeo champ Ty Murray, divvy up the caretaking of their baby boy. Jewel, 37, handles feeding while Murray, 42, tackles diaper duty. "Neither of us wants a nanny!" she says.

Mariska Hargitay

Amaya & Andrew

• Six months after adopting daughter Amaya last spring, Hargitay, 47, and her husband, Peter Hermann, 44, filed papers to adopt again. Surprise! Days later they brought home a son, Andrew. (Their oldest, August, is 5.) Says Hargitay: "We're pinching ourselves!"