Actress Jessica Alba showcased her hot body while on vacation with husband Cash Warren in Cabo San Lucas, Mexico on January 2, 2011. Singer Jessica Simpson, whose about to pop with her first child, tweeted: 'New goal: look like @jessicaalba after baby. Job well done lady!' Alba responded with this tweet: 'OMG! Ur so sweet! Thx hon!'

But can Simpson lose the weight in 4 months like Alba?



(Fame / Flynet Pictures)