It looks like 2012 is shaping up to be the year of babies. A slew of some of the most fashionable celebrities are expecting this year. One would think a baby bump might obstruct fashion choices; alas, that is not the case with these style divas. In fact, with that pregnancy glow, they look more gorgeous than ever.

Actress Hilary Duff is expecting her first child with husband Mike Comrie in March. The couple announced the good news in August, on the date of their one-year anniversary. We also want to share the exciting news that... Baby Makes Three!!! We are extremely happy and ready to start this new chapter of our lives, the 24-year-old beauty wrote on her official Web site. Duff has been photographed in Beverly Hills looking as gorgeous as ever. She wears everything from six-inch stilettos to skin-tight dress to skinny jeans.

Alessandra Ambrosio is pregnant with her second child with longtime fiance Jamie Mazur. The supermodel was even pregnant when she strutted down the runway at the annual Victoria's Secret Fashion Show in Dec. 2011. At the time, her pregnancy was a secret. Everyone was shocked to hear the news.

When I first found out I was pregnant I thought, 'Oh my gosh I don't think I'm going to be able to walk on the show,' and I didn't tell anybody so no one knew at the show that I was pregnant, the Victoria's Secret Angel, 30, told Us Weekly. A week before, I told my booker I don't think I'm going to be able to fit into the clothes because I gained a few pounds already, but we were just quiet. I cut all the sugars and sweets 10 days before and I got my trainer -- the one I usually get -- and we were doing lots of glutes and arms and back exercises.

Another daring mommy-to-be is Jessica Simpson. The blonde bombshell is pregnant with her first child with boyfriend Eric Johnson and is still rocking stilettos and designer duds. I went to the doctor yesterday and he said, 'You're gonna need to get out of those heels!' I was like, 'Excuse me! I'll be delivering in these heels! she said. Simpson has most recently been promoting her new NBC TV show, Fashion Star.

Real life has inspired the mogul to develop her own maternity line, which is expected to hit shelves in Feburary. It's really challenging to find adorable stuff. And fashionable stuff and stuff that doesn't make you look like a house, she told E! News. You want stuff that's flattering to your bump; you want to show your bump off. We're going to come out with some really great stuff. Lots of cute denim for all the ladies out there who are afraid to get dressed up pregnant.

Check out some of the most fashionable celebrities expecting in 2012.

Hilary Duff
The blonde beauty and former Disney queen is expecting her first child with husband Mike Comrie. "We also want to share the exciting news that... Baby Makes Three!!! We are extremely happy and ready to start this new chapter of our lives," the couple announced in August, on their first anniversary. Duff has been looking like a chic mommy-to-be while bopping around town. The 24-year-old even managed to complete a book tour. She is due in March. Twitter
Alessandra Ambrosio
Alessandra Ambrosio, photographed here at the 2011 Annual Victoria's Secret Fashion Show in Dec. was pregnant while walking down the runway, but did not tell anyone. "When I first found out I was pregnant I thought, 'Oh my gosh I don't think I'm going to be able to walk on the show,' and I didn't tell anybody so no one knew at the show that I was pregnant," she told Us Weekly. "A week before, I told my booker I don't think I'm going to be able to fit into the clothes because I gained a few pounds already, but we were just quiet. I cut all the sugars and sweets 10 days before and I got my trainer -- the one I usually get -- and we were doing lots of glutes and arms and back exercises." This is Ambrosio's second child with fiance Jamie Mazur. Reuters
Jessica Simpson Due Date
When is Jessica Simpson's due date? Hopefully soon! The pretty blonde singer said in a recent interview with Us Weekly that she feels "like a big blob." Jessica Simpson said that she is looking forward to the premiere of her new NBC show "Fashion Star" on March 13 and is excited to see her thinner frame. Reuters
Lily Aldridge
Supermodel Lily Aldridge and husband Kings of Leon frontman Caleb Followill are expecting their first child together. “We can’t wait to meet the new addition to our family," the couple announced. They married in May. Aldridge is known for her grungy-chic style and, of course, killer good looks. Facebook
Sienna Miller
The fiercely fashionable Sienna Miller is expecting her first child with boyfriend Tom Sturridge. Although no official announcement has been made, on Jan. 6 news publications reported that Miller is with child. Her sister Savannah Miller somewhat confirmed the speculation, tweeting "THRILLED." Reuters
Molly Sims
The supermodel tied the knot with boyfriend Scott Stuber in Sept. and announced her pregnancy shortly after. "Our little bundle of joy is a honeymoon baby, due at the end of June. A first pregnancy is a nerve-wracking experience of course, but mostly we are just thrilled and excited. We can't wait to meet him or her," said Sims. She has already has the new-mama glow, photographed sporting parachute pants and drinking Pressed Juicery. Reuters
Candice Crawford
Candice Crawford, sister of "Gossip Girl" actor Chace Crawford, is currently pregnant with her first child with Dallas Cowboys husband Tony Romo. The couple wed in Texas in May in front of 600 friends and family. In October, the couple announced they are expecting. Crawford, who is 24-years-old, was form Miss Missouri. Here the blonde beauty poses during the beauty pageant. Facebook
Jennifer Garner
Actress Jennifer Garner is pregnant with her third child with husband Ben Affleck. The couple already has two daughters -- five-year-old Violet and two-year-old Seraphina Rose. The star will reportedly give birth any day now. Reuters
Kourtney Kardashian
At the end of November, Kardashian revealed she is pregnant with her second child with boyfriend Scott Disick. It wasn't like we weren't trying... We kind of just said, 'If it's meant to be, it'll be,'" she said. She currently has a baby boy, Mason. Reuters
Marley Shleton
Actress Marley Shleton is pregnant with her second child. The 37-year-old actress and producer husband Beau Flynn already have a 2-year-old daughter together, West. They “couldn’t be more excited." Reuters