Kylie Jenner's lips are the center of attention on tonight's episode of "Keeping Up With the Kardashians," however, while some are praising the 17-year-old reality star for finally coming clean about her use of lip fillers, Jenner's older sister Kendall Jenner slams her for being obsessed with perfection.

E! Online reports that in an all new sneak peak from tonight's episode of "KUWTK," Kim Kardashian tells sister Jenner, "Your lips look amazing," after she begins to use fillers to plump her pout. However, Jenner still hangs on her insecurity with her lips, telling Kardashian, "Kendall said they look too big yesterday."

Kardashian comforts the young star, telling her, "I think if something makes you insecure and you've been feeling that way forever, who doesn't want to look amazing? Do what makes you happy."

Kardashian then adds, "We've all had our own insecurities and it's nothing to be ashamed of," before admitting that she has her own struggles with body image and that she "cannot leave the house without Spanx."

Kendall has been the most outspoken in the Kardashian-Jenner clan about her family's obsession with their outward appearance, often telling sisters Jenner and Kardashian that they are "gorgeous" and don't need to change themselves, however, it appears that insecurity took over the youngest of the family, resulting in what Jenner calls "temporary lip fillers."

The revelation regarding Jenner's collagen injections comes only weeks after the "Kylie Jenner Lip Challenge" took over the Internet, in which fans attempted to achieve Jenner's famous pout by sucking on shot glasses, often with disastrous results.

Jenner admits in another sneak peek of this week's episode that she didn't "lie" about not having plastic surgery, however, "tiptoed around the truth" for fear that the media would pick her and her family apart for allowing her to have work done before being a legal adult.

This article was originally published on Fashion & Style.