Khloe Kardashian is hitting the gym this week and posting gym selfies to prove it.

The "Keeping Up with the Kardashians" star took to her Instagram to post a photo of her self in her Nike wear, cornrows and shades in front of every woman's go-to workout machine -- the glute toner. "I am determined to get my pre-hamptons, pre-sympathy Kourtney pregnancy weight off," she captioned.

Khloe jokingly blames older sister Kourtney Kardashian who is pregnant with baby number three. "Nothing good comes easy. Why do I blame Kourt though?!? Lol." Khloe added.

Seems like the reality star put on a few unwanted pounds while filming her E! spin off "Kourtney & Khloe Take The Hamptons" over the summer. The Kardashian sister recently tweeted that she "started working out again this week after slacking for a few months while taping in the Hamptons" and "I def gained about 10 lbs or even more. Oye! Focused now."

Lamar Odom's ex, who is rumored to be taking a break from rapper French Montana after he was acting too "needy," also plays the blame game with best friend Malika. She Instagrammed another photo which she captioned "I had to do something in the gym today. I ate so poorly yesterday. I blame @theforevermalika lol."

Khloe has proven to be really tough on herself when it comes to staying fit. The youngest Kardashian sister has been scrutinized in the past for having a different look than sisters Kourtney and Kim, but she has turned it around on the media by becoming a fan favorite.

Do you think Khloe is staying fit to make her exes jealous? Is the pressure of being a TV personality getting to Khloe?

Want to keep up with Khloe Kardashian? Take a look at her Instagram photos here.