A stripe of blush above the cheek bone.

The black or dark lip liner with either frosted or no lipstick. I don't know why women still do this. Its just wrong on so many levels. 

I worked at a cosmetic counter and I had a girl tell me that she used 3 different shades of foundation to contour her face, slim the jaw, create cheekbones. It looked awful, and her neck....totally different color than her face. Seriously..........

dark foundation, thick black eyeliner, lines of blush that wasnt blended, i also think the white highlighter women use under their brow bone is not attractive

too much bronzer and super thick eyeliner, so tacky!!

The foundation line/mask!!! eww.. that's the worst!! I second the dark lipliner and frosty shade on lips too. Soooo 90's! Not a fan over plucked brows drawn in with a sharpie either!! lol

foundation that does not match their natural skin color, usually i see way too light. you can totally tell where the foundation was applied because it doesn't match the color of their neck

When you say "girls", I don't know if you mean girls just old enough to start wearing makeup, or us "older girls", but in any case, my beef is simply too much.  You see the make-up, not their face.

That contouring stuff someone mentioned is pretty ambitious for the average WOMAN, let alone girl.  I never did it, but I've heard of such a thing as contouring kits.  But they take a lot of practice I hear, and until you get the hang of it, leave it to the pros to do it for you!  "Routine" makeup is enough to master.

Definitely when their face looks like a mask due to the wrong foundation color!

The ones I see the most are too thick black eyeliner and foundation that is too pink or too orange.