It's the case of the disappearing and reappearing lips!
Just today she posted an image of herself with a friend and there was a rather suspicious-looking blemish on the right corner of her upper lip that some are saying may be an injection site for a lip plumper.
We don't know! It could also just be a pimple or love bite or something.
There's no denying that when comparing past pictures with more recent ones, the 16-year-old's lips look much fuller, but it's hard to determine if it is indeed some type of plastic surgery or just a good makeup artist.
Or consider this: Maybe Kylie's secretly an apiarist and sometimes the bees she's handling freak out and bite her. Thus, giving her these full, luscious lips.
Check out two more then and now comparisons …AFTER THE JUMP!!!