Son Ignatius Martin was born April 13.
Cate is always effortlessly elegant, and maternity dressing is no exception (see recent Academy Awards, Film Spirit). We’re also dying to know her baby name shortlist for #3; with sons Dashiell and Roman (she’s reportedly having another boy), we know it’s gonna be a good one.
Due date: Her twins Max and Emme were born on February 22.
Best known for: Her famous boyfriends (P. Diddy and Ben Affleck) and her many marriages. And — oh yeah — she sings, dances, and acts, too.
Baby’s daddy: Singer husband Marc Anthony
Defining Maternity Moment: Just call her Mommy from the Block. When Lopez’s famously cut abs went undercover, the chatter started. When she started toning down her dance moves and wearing empire-waist dresses (and, um, did she eat a huge lunch?), the gossip reached a fever pitch. She finally confirmed her obvious pregnancy on the last date of her concert tour, but remained mum on the baby’s ETA or the speculation that she was carrying twins.
Christina Aguilera

Due date: Son Max Liron Bratman was born January 12.
Best known for: Possessing killer pipes, and going from sexed-up to old-school on her latest album, Back to Basics
Baby’s daddy: Music exec husband Jordan Bratman
Defining Maternity Moment: Privacy, apparently, is what a girl wants. In the first few months, Aguilera wouldn’t confirm her preggo status, but she pointed out her bump with a big smile on stage, and Paris Hilton forced her out of the pg-closet by calling her “the most beautiful pregnant woman in the world.” Near the end of her pregnancy, she finally flaunted the belly during a nude photo shoot for Marie Claire.
Nicole Richie

Due date: Daughter Harlow Winter Kate Madden was born January 11.
Best known for: Starring in The Simple Life — and being very very skinny
Baby’s daddy: Good Charlotte rocker Joel Madden
Defining Maternity Moment: And you thought everyone knew about you well before the 12-week safe-to-tell mark! Buzz that the itsy-bitsy Richie was preggers started when she was just 10 weeks along. She used all manner of diversions — pillows, flowy clothes, huge designer purses — to hide her bump, but when she confirmed the pregnancy at almost four months, we all already knew.