From Oscar winners to teen stars all grown up, it was a huge year for celebrity pregnancies. 2010 made new moms out of stars like Ali Larter and Alicia Keys, while others like Penelope Cruz and Pink are still awaiting their bundles of joy. Stella McCartney and Luciana Damon each turned their older kids into big siblings yet again. Sandra Bullock is running away with the favorite new parent poll, so check out the baby bumps that may become our favorite families of tomorrow!

Also, don't miss all our Best of 2010 coverage across the PopSugar Network!

Ellen DeGeneres and Portia de Rossi flashed matching smiles yesterday while out for a walk in St. Barts. The duo are off enjoying a fun vacation to celebrate wrapping up another successful year. It's been a busy one for Ellen with her daytime TV show, and she also kept fans laughing with her tweets — Ellen ranked among your favorite people to follow on Twitter. Portia, meanwhile, had a whirlwind press tour to promote her new book about her struggles with an eating disorder. She and Ellen are among the cutest couples of 2010, and they cemented their place on the list by bringing their PDA out on a boat to wrap up their afternoon of sightseeing with a cruise.

Salma Hayek and Valentina Pinault enjoyed the sun together in St. Barts yesterday. They both chose bikinis, Salma in orange and Valentina in blue, to play in the ocean and build sandcastles with friends. The mother-daughter duo are the latest in a long list of stars celebrating the holidays with warm vacations. Diddy and his on-again lady friend Kim Porter are also vacationing on the French island, while Bar Refaeli, Cindy Crawford, and Molly Sims are hanging out in Cabo. Salma and Valentina got into the Christmas spirit by visiting Santa a few weeks ago in Paris, and now they're wrapping up the holidays with more family fun.

Michelle Williams showed off her trendy pixie cut on the cover of December's Angeleno magazine. The accompanying article is the latest in Michelle's long line of efforts to promote Blue Valentine, which hit theaters today — Buzz raved about the project and called it a must see. Michelle and her costar Ryan Gosling have given sweet, funny joint interviews, but she was solo in this publication to talk about more personal matters. She touched on finally feeling her age at 30 and finally watching Brokeback Mountain with her rapidly growing daughter Matilda. Michelle said:

• On Matilda growing up "Her hair is down to her chin and she has decided she can have her bangs trimmed, but she doesn’t want a bob anymore. A bob is cute for a three-year-old but she is five now. . .it’s crazy how fast time is going for me and how agonizingly slow it is going for her. When she was four she would say ‘I am four and a half,’ ‘I am four and five-sixths,’ ‘four and seven-eighths,’ because all the increments mattered."
• On Brokeback Mountain and someday watching it with Matilda: "I was just an actor who happened to be lucky enough to be in the right place, and it was the place where I met Matilda’s father, and that is a lot. It was a lot. And it will be a lot for Matilda too, when she gets around to watching it. I will watch it with her, when she’s ready. It is hard to imagine what that would feel like, but one day, yes, we will watch it together."
• On finally feeling her age: "I’ve done a lot. I have taken on a lot of things earlier than would be the standard in terms of working, of being in a serious relationship and having a child. I was 25 when I had Matilda and so I feel like I have caught up to myself, and 30 feels like a number that maybe matches all those things a little bit better."