Hot mama Kourtney Kardashian and hotter auntie Kim Kardashian bring out the big guns in a bikini duel for the ages as they prepare for a swimwear fashion show in South Beach.

Kourtney Kardashian lost a lot of weight recently. She revealed that being a busy mom to baby Mason took off some of the weight and she also said that she feels sexier than ever!

Kim and Kourtney Kardashian In A Bikini At South Beach

Let us know who you think wins this battle of the bods?

[memedex: pollid#]