Kylie Jenner Lip Kit Sells Out As 'Pissed' Fans Pout: Teen Queen & Kardashians Try Corset Waist Trainer Weight Loss

Kylie Jenner only recently turned 18, but she's already turned her coming-of-age milestone into a year to remember. From hosting club appearances to rocking the red carpet, Kylie is quickly becoming the leader of the Keeping Up With the Kardashians pack. And just in case further evidence is needed, her Lip Kit By Kylie became a sold-out success faster than you can pout your lips and coo, "Genius Jenner."

Just one problem with all that success. Kylie is annoying some fans by promoting a product that they can't seem to buy unless they're an inner member of the Jenner generation, reported Mic.

Lip Kit By Kylie comes with matte lipsticks designed to provide Jenner wannabes with the chance to make their smiles resemble their idol's. However, the fact that it is always advertised but inevitably sold out isn't enhancing the fans' view of Kylie.

Kylie Jenner provides the perfect pout.
Kylie Jenner provides the perfect pout. [Photo by Jason Kempin/Getty Images]The product initially rolled out last month, with so many eager would-be buyers that the site crashed one hour following its live debut. Oops. Then came promises of restocking, but again, it quickly sold out faster than fans could determine shade to buy.

Twitter is expressing its frustration regarding the Teen Queen's kit, with "pissed off" as the general response.

While her fans are expressing their lip kit frustration, Kylie along with sisters Khloe Kardashian and Kourtney Kardashian is hopping on the bandwagon of a new trend that's actually a rebranding of an old trend. Say hello to corset waist trainers, which promise to give you an hourglass figure and are increasingly popular among celebrities such as Jenner and the Kardashian sisters, according to People.

Jenner revealed her fondness for the waist trainer in a selfie with Khloe and Kourtney.

"Posted up with my babes getting our waists right," shared the 18-year-old Teen Queen.

But it is Khloe who has been the real fan of the corset waist trainer. The 31-year-old, recently slimmed down Kardashian reality TV star recently headed back to the gym after taking two months off caring for her estranged husband, Lamar Odom.

"This band makes me sweat more in our tummy area so it give me that extra boost when I m feeling a little bloated. I love how my posture in the gym is even better due to wearing it," revealed Kardashian on social media about her waist trainer.

Khloe Kardashian joins Kylie Jenner in endorsing the corset waist trainer.
Khloe Kardashian joins Kylie Jenner in endorsing the corset waist trainer. [Photo by Charley Gallay/Getty Images for Kardashian/Jenner Apps]In addition to Jenner and the Kardashian sisters, Kim Zolciak, Jessica Alba, and Amber Rose are candid about their use of corset waist trainers for slimming down, according to the Daily Mail.

And with Kim Kardashian also a fan prior to her pregnancy, celebrities are keeping the trend hot.

As the Inquisitr reported, however, some experts advise against the use of a corset waist trainer for slimming.

Although it can provide a slimmer look for an evening out, permanent results such as fat loss are not likely, according to health and fitness professionals. In addition, extra-tight waist trainers can result in problems ranging from heartburn to difficulties breathing.

Kylie isn't stopping with the use of a corset waist trainer to slim down, however. Jenner also has climbed on board the home exercise machine bandwagon, revealed E! News.

Kylie Jenner gets into fitness.
Kylie Jenner gets into fitness. [Photo by Jason Merritt/Getty Images]With her booty moving wildly on the machine, Kylie shared her shake-it-up workout on Snapchat.

"I'm shaking," admitted Jenner. "Stop, stop it."

Sharing the shaky joy with pals, Kylie encouraged Jordyn Woods, a model and friend, along with Harry Hudson to give the exercise machine a spin.

[Image via Kylie Jenner/Instagram]