PHOTOS

Beyonce showed off her rocking post-baby body at Michelle Obama's fundraiser for the president's re-election campaign on Monday night in NYC. Just 10 weeks after giving birth to baby Blue Ivy, the "Irreplaceable" singer, 30, donned a navy curve-hugging, sophisticated dress by designer Victoria Beckham. Of course, it sounds like she had a little help! According to Star magazine, trainer Marco Borges lived with her for two-a-day workouts at 5 a.m.

 The fashion-forward Beyonce announced she and husband Jay-Z were expecting their first child last August at the 2011 MTV Video Music Awards. In the following months, we saw her step out in a succession of ensembles featuring sky-high heels, mini dresses, and blousy tops with skinny jeans and pants to cover her growing baby bump. Baby girl Blue Ivy arrived January 7. (12/21/2011)

No, it wasn't just a dream. Jessica Alba really did have a second child! The 30-year-old quickly whipped her body back into shape. Her secret? Hitting the gym just two weeks after Haven's birth, for starters. "I didn't gain as much weight with my second pregnancy, so I think that really made a big difference," Alba told Us Weekly. "I did prenatal yoga up until the very end. I just made healthier choices. I started working out and not going too ...

 Jessica Alba was even adorable pregnant! Last February, the "Valentine's Day" star revealed that she and hubby Cash Warren would add a daughter to their brood that already included daughter Honor, 3. "Honor is going to be a Big Sister!" the actress wrote on her Facebook page. "Cash and I are thrilled and wanted to share the news directly with you so you didn't hear about it somewhere else." (7/31/2011)

 For her second pregnancy, Kate Hudson learned a lot from her first – primarily, how to not overeat. While pregnant with son Ryder Robinson, now 8, the “Something Borrowed” actress says she ballooned to 185 pounds, which was “emotional” to take back off. But this last time around, Hudson, 32, barely had an appetite, especially during the first trimester. “I only just started getting a bigger appetite,” she told Marie Claire last spring while in ...

 After little Bingham Hawn was born in July (daddy is Hudson’s fiance, Muse singer Matthew Bellamy), all the mindful eating really helped the new mom bounce back quickly. Just seven weeks later, the actress donned a bikini in the South of France – and she looked fantastic. And when Hudson hit the red carpet at the Vanity Fair post-Oscars bash in February, she was a red-hot mama! (2/26/2012)

 Keri Russell is blessed with a naturally petite frame, which came in handy during both of her pregnancies -- after all, she is nearly seven months along in this photo! But the former “Felicity” star, 35, says she also maintained a healthy diet and exercised moderately. (9/10/2011)