Hollywood's Hottest Mamas

Kristin Cavallari! Jessica Alba! Beyoncé! See star moms showing off their sizzling post-baby bodies in sexy swimsuits

JESSICA ALBA

Talk about unfair! The mom-of-two gives fans a peek at her abs-tastic body in a two-toned bikini while soaking in the sun April 7 in St. Bart's. Her flat-tummy secret: wearing a waist-cinching corset right after having daughter Haven in August 2011.