"I'm so insecure lately. Seriously, just with my weight. I cannot leave the house without Spanx."
Kim's weight gain could be attributed to her love of fast food. Earlier in the episode she told her sisters a "life-changing" event had taken place - an In-n-Out Burger had opened in her neighbourhood.
She later showed her older sister Kourtney Kardashian some pictures from a nude photo shoot she had taken part in for her website earlier that day.
She laughed: "We went to KFC on the way there. Can you believe it?"
However, Kim said she only ate the chicken.
"I didn't eat the potatoes or anything like that."
Shocked Kourtney quipped: "Just a fried, greasy bucket of chicken!"
And it seems her calorific craving didn't end there that day.
Kim admitted: "And then we went to In-N-Out on the way home."
- BANG! Showbiz