Finally having enough, Kylie Jenner took to her Twitter account to defend herself against rumors saying that she's had lip injection to achieve a full pout.

In a series of tweets, the 17-year old teen posted on October 28, she said, "How long are we gonna talk about this lip thing lmao. Let's get our lives together guys and talk about some important sh*t. Just talk about something new at least. I'm bored."

This is what Kylie's lips look like now on a selfie she posted on her Twitter account weeks ago.

And below is how her lips looked like back in May 2012.

It's no secret that the youngest member of the Kardashian siblings is naturally pretty, but if the plastic surgery rumors are true, it really appears that she's following her older sisters' footsteps when it comes to achieving beauty.

Entertainment Wise reported that the rumors regarding Kylie's suspected cosmetic surgery started earlier this year, and the "Keeping Up With the Kardashians" star only fuelled the gossips due the increasing number of photos posted on her Instagram account -- flaunting her now fuller and luscious lips. Most of those pictures usually feature Kylie doing a duck pout.

Entertainment Wise also reported that the lip injection issue isn't the first plastic surgery rumor to have crossed the teen's path. According to the report, there were also speculations that Kylie has had surgery on her entire face -- particularly on her cheeks -- which look contoured recently. However, it may also be due to excellent make-up tricks.

Another rumor is that Kylie also had botox for her eyebrows and around her lips, Hollywood Life reported. The teen has defended herself against these accusations, saying "These plastic surgery rumors hurt my feelings to be honest and are kinda insulting. Just in case anyone forgot.. I'm 16," as reported by Hollywood Life.

Plastic surgeon Dr. Lyle M. Back told Hollywood Take that it is obvious that Kylie had lip injections. "Unfortunately, she has that tell tale and not so natural 'duck lip' look going on. It looks like all the filer went into her upper lip - none in the lower. I like a little but more of a 'pout' in the lower lip. Her upper lip has been overfilled."

A Radar Online source revealed that Kylie is feeling quite overshadowed lately by her older and famous siblings, especially now that Kendall Jenner is quickly making a name for herself in the modeling industry.

"Living in the shadows of her sister Kendall's incredibly successful modeling career is really hard on Kylie. Everyone in the family gives all of the attention to Kendall. She feels like the other Jenner," Radar Online's insider revealed.