Omg!!! Kylie Jenner threw shades at Blac chyna

Last night, Tyga's babys mother CHYNA, proudly posted a pic . . . showing off her diamond ROLEX that Tyga bought her. Just a few hours later - shortly after MIDNIGHT LA time, Kylie posted a pic of her wearing THE SAME WATCH, presumably Tyga bought THEM BOTH THE SAME WATCH.

Wow . . . Kylie's just 17 and already she understands how to do ADVANCED SHADE TECHNIQUES. That wasn't no amateur shading . . .