Why you might ask? Because she's put her fat ass on a diet, that's why. I should put mine on a diet too. It's not nearly as big as Kim's, but I've just "indulged" in a few too many sugary sweets and party mix, without having done Turbo Jam in a few days. 

So ya... here's Kim waving for the paps, without clueing in that yes, they do have high res lens! According to our sources:

Kim Kardashian showed off some freshly polished nails as she left a Beverly Hills, CA nail salon with sister Kourtney Kardashian in tow. As the sisters drove away a Slim Fast shake was visible in the cup holder of their car. Could this be the secret to Kim's curvy but slim physique?

Ahem, did you say curvy but slim? P-lease, you could slap a spanx bodysuit on just about anyone and they'd look slim. I bet she even works out in one!

Fame Pictures