Kim, is that you?

Kylie Jenner and a pal headed to Sephora in Calabasas for a little makeup shopping yesterday, and the youngest of the Kardashian sported a crop top and spandex that highlighted her growing butt! First the massive lips, then the suddenly fuller chest, and now a plump booty! Kris Jenner is obviously letting her little girl go under the knife, and it's shocking. The teenager looks like she's thirty years old!

Her drastically changing looks have everyone closest to her worried, including her famously image obsessed sister Kimmy K!

"She has gone totally overboard. Her friends are worried. Even Kim of all people has told her to stop," an insider recently dished to Life&Style. "She has gotten so much attention from having her nose and lips done that now she can’t stop," the source added.

Even her mom thinks she has gone too far. "Kris supported Kylie at first because Kim, Kourtney, Khloe, and Kendall were hogging the limelight. Kris wanted Kylie to feel good about her looks, but now she feels things have gotten out of hand," the source explained.

She should really tone it down!