Khloe Kardashian & her massive Ukwu step out in Calabasas [pictures]

The reality star and her massive butt pictured yesterday going to the gym (left) and pictured right shopping in Calabasas on Tuesday. When a paparazzo asked Khloe "Who has the better butt between Kim or yourself?" Khloe responded, "Definitely Kim". Well, her butt is catching up!