Baby Weight: Which Celeb Moms Win at Losing?

In this week's issue of OK!, new mom Kourtney Kardashian reveals how she's trimming down following the recent birth of son Mason Dash Disick. But only time will tell whether the reality star will be like some celeb moms, such as Ellen Pompeo or Nicole Richie, who have no trouble shedding the baby weight right away, or if this will be a long-term battle of months or even years!

Here, OK! takes a look at the superstar moms who've succeeded — and those who have struggled — to get back into their famous form.

Click through the gallery to see which celeb moms win at losing!

EXCLUSIVELY IN THE NEW ISSUE OF OK!, NEW MOM KOURTNEY KARDASHIAN REVEALS ALL THE DETAILS ON HOW SHE'S SLIMMING DOWN WITH HER HUNGER-FREE DIET AND EXERCISE PLAN!

•ALSO IN OK! THIS WEEK:

• Jennifer Aniston: OK! reveals what's really going on with Gerard Butler.
• Jessica Simpson: The singer is embracing her curves and revealing that she loves her body!
• Haiti: From Wyclef Jean to Angelina Jolie to Lady Gaga, find out how all the stars are doing what they can to help.