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Beyoncé - Celebrity moms have a lot of help getting their pre-baby bodies back, but some comebacks are nothing short of miracles. Beyoncé didn't do much to squash those crazy fake pregnancy rumors when she hit the stage in Atlantic City just five months after giving birth. She wore a tassled bodysuit and looked better than ever!(Photo: Dimitrios Kambouris/Getty Images)

Photo By Dimitrios Kambouris/Getty Images

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Mariah Carey - There's nothing like a multi-million dollar endorsement deal to motivate you to get on the treadmill. This famously curvy singer, who gained more than 80 pounds while carrying her twins got back into fighting form thanks to Jenny Craig — and one simple goal: "Do I fit into my shorts from the 'Fantasy' video?" she claims she asks herself. "OK, I’m good."   (Photo: PacificCoastNews.com)

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Tia Mowry - When your job is to look good, there's no time for late night cravings and long afternoon naps. Tia Mowry had to whip herself back into vixen shape just six weeks after giving birth to her son, Cree Taylor, to resume filming for The Game. (Photo: Thomas Janssen, Pacificcoastnews.com)

Photo By Photo: Thomas Janssen

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Jennifer Hudson - This formerly full-figured singer and actress wasn't content to just lose the baby weight, she kept on going until she dropped an additional 10 sizes. The Weight Watchers spokesperson has managed to keep the weight off for over two years and motivated millions of others to follow in her healthy footsteps.  (Photo: Christopher Polk/Getty Images)

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Nia Long - The Love Jones star is blessed with good genes and a great work ethic, which allowed her to get back into pre-baby shape just five months after giving birth to her son, Kez. The key to her quick comeback? Exercise, exercise, exercise. (Photo: Jonathan Leibson/FilmMagic)

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Kourtney Kardashian - The tiniest Kardashian sister filled out quite a bit during her first pregnancy, and viewers of her reality show got a good look at the grueling routine it took to get herself back to her pre-baby body. The pint-sized star worked hard and flaunted the results in numerous paparazzi bikini pictures. But will she be able to repeat it after giving birth to her second child? (Photo: Frederick M. Brown/Getty Images)

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Jennifer Lopez - Forget her album, her new boyfriend or the lucrative American Idol contract — the only comeback that has people talking when it comes to J.Lo is, frankly, her astounding body. The 44-year-old mother of twins looks half her age in both face and physique, which probably explains her dating choices of late. Hey, if you got it, work it! (Photo: Mickshaw/PictureGroup)

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Alicia Keys - Keys stayed pretty active throughout her pregnancy (remember seeing the eight-months-preggers star crawl on that piano for her Prince tribute performance at the 2010 BET Awards?) and wasted no time getting back in her teeny bikini after giving birth to her son, Egypt. One aspect of pregnancy the star did keep long after delivery? Her glow. (Photo: Pascal Le Segretain/Getty Images)

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Jessica Alba - Alba's body is her instrument, and the sexy actress tuned it like a whistle following the birth of her first child, Honor Marie. She followed a strict vegan diet outlined by the book Skinny Bitch, and trained daily with celeb sweat-maker Ramona Braganza, who paired her with another celeb mom, Jaime King, as her workout buddy. (Photo: Andreas Rentz/Getty Images)

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Melanie Brown - There was nothing scary about Mel B's post-baby body! The former Spice Girl was more than ready to shed her cover-up when spotted by paparazzi on the beach just six months after the birth of her third child. Later, she rocked a skin-tight white dress to host an awards show in New York City, prompting the blogosphere to re-name her Bangin' Spice. (Photo: Cameron Spencer/Getty Images)

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Halle Berry - All women's bodies are wondrous, but Berry's is approaching divinity. The perfect-10 star didn't have to sacrifice a single one of her dangerous curves after giving birth to her daughter, Nahla, and even took on a role (in Dark Tide) that required her to spend the entire shoot in a bikini.  (Photo: Koi Sojer, PacificCoastNews.com)

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Jada Pinkett Smith - Will Smith's wife is one of those rare women whose body actually got more toned after giving birth (see also: Jennifer Lopez). Her rock-hard abs and chiseled biceps should be a threat to any dirty-minded boy that comes near her daughter, Willow.  (Photo: Carlos Alvarez/Getty Images)

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Paula Patton - Talk about an impossible mission. Patton had only two months to get into sexy sidekick shape for her role in Ghost Protocol.  The actress describes her routine as “the most grueling and one of the hardest things I’ve done. I worked out for two and half hours, six days a week for a couple of months. It was so hard!” (Photo: Frederick M. Brown/Getty Images)

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Christina Milian - With a pregnancy as difficult as Milian's (her baby daddy, The-Dream, filed for divorce nine days before she gave birth), no one would blame the pop star for taking to her bed with pints of Ben & Jerry's. But the new mom proved that looking good is the best revenge, and whipped herself back into music-video shape in no time flat.  (Photo: Adrian Sidney/PictureGroup)

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Kimora Lee Simmons - Her struggles with dieting have been captured hilariously in her reality show, but mother-of-three Simmons stunned viewers when she suddenly appeared back to her runway size following the birth of her son, Kenzo. Was it the move to Los Angeles that finally inspired her? (Photo: Paul Archuleta/FilmMagic)

Photo By Photo: Paul Archuleta/FilmMagic