Too bootylicious for her own good?

She's got one of the most famous posteriors in the world these days, but Kim Kardashian fretted over the weekend that she looked less-than-flattering in a pair of skintight jeans.

PHOTOS: Kim's best booty moments

"Ummm in a fitting w @MonicaRoseStyle I think my butt looks too big in these jeans," Kardashian, 31, wrote on her blog beneath a closeup shot of said rear end in a pair of shiny, super-clingy denim jeans.

With a slimdown in mind, Kardashian kicked off her week on Monday with an "early morning double workout," she Tweeted. "Bootcamp and pilates. Love starting my Monday like this!"

PHOTOS: Her biggest TMI TwitPics

The most recent episode of Keeping Up with the Kardashians, meanwhile, laid bare some considerable tensions between Kim and her siblings -- especially little brother Rob, 25, who burst into tears during a family therapy session.

"Kim is the most selfish person and doesn't want to ever include me," Rob later said following a blowout fight.

VIDEO: Kim gets a butt x-ray

Complained Kim: "I don't really want to talk to a stranger about my family problems."

This article originally appeared on PIC: Kim Kardashian Thinks Her Butt "Looks Too Big"