Kim Kardashian & Khloe Kardashian Flaunt Weight Loss, Weigh In On Justin Bieber & Kourtney Kardashian Hookup

Kim Kardashian is loving her weight loss results, and the Keeping Up with the Kardashians star is flaunting her newly slim figure in public and on social media. Kim has lost 42 pounds since welcoming her second son, Saint West, into the world, reported Yahoo.

Kim and Kanye West attended Justin Bieber’s concert at Los Angeles’ Staples Center on Monday night for a just-the-two-of-us occasion, and then expanded the family fun to include her sisters Kourtney Kardashian and Kendall and Kylie Jenner on Wednesday night. Kylie’s beau Tyga also attended.

Showing her weight loss in a sheer top and closely fitted black skirt, Kim made her pride in her slim success evident. And although she’s shed 42 pounds, the KUWTK star has set a goal of losing an additional 28 pounds.

The "Keeping Up With The Kardashians" clan show some love for fans.

In order to stay motivated to follow her weight loss plan, Kim posted throwback photos showing her body after she had slimmed down following the birth of her daughter North, noted the Daily Mail.

Those selfies motivate Kim to keep going, she shared.

“I was pretty proud of myself,” recalled Kim. “I just wanted to take some pictures, some selfies, to remember how I felt when I felt just like, “Okay I did it, I accomplished it. I am in really good shape.”‘

As the Inquisitr reported, both Kim and her sister Khloe Kardashian have turned to the same nutritionist. Khloe has lost a total of 40 pounds, crediting giving up dairy for boosting her weight loss and helping her to achieve her revenge body. Kardashian has been flaunting her own revenge body on social media as well.

As for all those rumors and speculation that Khloe had a nose job? Kardashian credits her weight loss, not plastic surgery, for the changes in her face, reported Hollywood Life.

Dishing on the topic during an episode of her talk show, Kocktails with Khloe, the 31-year-old KUWTK star explained that she only tried fillers, and that was a fail.

“[Fillers] did not work for me,” said Khloe candidly. “My face was so f***ed I had to go and get this whole thing dissolved. It was a bummer and now I’m afraid to do it again.”

Kim Kardashian, Khloe Kardashian, Kendall Jenner, Kylie Jenner and Kourtney Kardashian dish at presentation.

As for the nose job rumors, Khloe cited an expert as confirming that she had not had the procedure.

“[Dr. Paul Nassif] was like ‘you definitely have not had your nose done.’ I was like thank God,” Khloe declared.

Moreover, one of her guests, Botched plastic surgeon Terry Dubrow, pointed out that shedding pounds causes changes all over, including the face.

“You’ve lost a bunch of weight? So the nose in the areas below the skin have fat,” pointed out Dr. Dubrow.

In addition to Keeping Up with the Kardashians and her talk show, Khloe is working on a makeover show that will teach others how to sculpt their own revenge bodies, as she’s indicated on Instagram.

While Kim and Khloe both are focusing on their figures, they’re never too busy to pay attention to other members of the Keeping Up with the Kardashians family. And both sisters have become involved in the hot hook-up that’s been off and on between Kourt and Justin Bieber.

As the Inquisitr reported, the 36-year-old mom of three hooked up with the then-21-year-old pop star soon after splitting from baby daddy Scott Disick. But with new reports that the now-22-year-old Biebs is rekindling his romance with Selena Gomez, Kim is concerned about her sister, an insider told Hollywood Life.

The insider revealed that Kim is feeling extremely protective of her sister and lectured the 22-year-old about just how vulnerable she is after her breakup from Disick.

“Kim told Justin to stop playing with Kourtney’s emotions,” said the insider, who added that Kim then asked him if he knows the definition of vulnerable.

“[Kim] told him his homework assignment was to look it up, understand the meaning, and to think of Kourt when he reads the definition because that’s where she’s at in her life right now… she doesn’t want anyone messing with her family.”

As for Khloe, the revenge body queen finds it all amusing, as she revealed on social media. Khloe has become fond of posting questions to her followers, and when they responded to her question about Beliebers by advising her to ask her sister, Khloe couldn’t resist joking, noted Gossip Cop.

“Is there an age limit on being a belieber? #SeriousQuestion,” tweeted Khloe.

The responses overwhelmingly referred to Kourt’s hookup with the Biebs, and Khloe was quite entertained.

“I am dying at all the replies telling me to ask Kourtney LOL. YAAAASSSSS with the shady ways lol,” tweeted Khloe.

[Photo by Cindy Ord/Getty Images for Allergan]