Kendall Jenner may be a supermodel in the making, but that doesn't mean she's picture perfect every single day!

On Wednesday the reality TV starlet hit the gym in Los Angeles, and Kendall gave us a peek at her makeup-free mug when X17 photographers snapped her leaving. Kendall tried to cover up when she was in the parking lot, but she made no attempt to hide once she got behind the wheel of her black Range Rover.

Meanwhile her big sister Khloe hit a different gym across town, and rather than going au naturel, it appears as though she put on a thick coating of lip gloss. Either that or she just got injections ... or maybe she's going the Kylie route and putting lipliner half a centimeter outside of her natural lip line? Check out the pictures in the gallery below and tell us what you think!