Beyonce showed off her amazing weight loss on the beaches of St. Barts while vacationing with husband, Jay-Z, just three months after welcoming daughter, Blue Ivy Carter.

While Beyonce decided to cover up her tummy with a black two piece bathing suit, many celebrity moms bared their flat bellies shortly after giving birth.

Many celebrity moms have access to trainers, nutritionists and Photoshop, but for some of these celebrity moms the flat belly after baby comes down to good old fashioned genes.