3. Jennifer Garner

 Jennifer Garner arrives at the - ARGO- Premiere at Samuel Goldwyn Theater on October 4, 2012 in Beverly Hills, CAkathclick/Bigstock.com

Ben Affleck’s better-half also took only a few months to shed the flab after the birth of their second child Seraphina in Jan 2009. Want to know her secret to post pregnancy weight loss? She says she undertook exercises such biceps curls and lunges. Not only this, she trained three to five times a week for brief amounts of time with two minute intervals of running.

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