Kourtney Kardashian proudly puts bodacious behind on show in a thong bathing suit in Miami

Her sister Kim has one of the most famous derrieres in the world.

And it looks like Kourtney Kardashian is giving her younger sibling a run for her money.

The 37-year-old reality star put on quite the eye-popping display as she hit the beach in Miami on Saturday.

Pert: Kourtney Kardashian showed off her assetsĀ as she hit the beach in Miami on Saturday

Pert: Kourtney Kardashian showed off her assetsĀ as she hit the beach in Miami on Saturday

Fighting fit: Kourtney spends hours a week in the gym and it definitely showed on this outing

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