This is my first time writing a critique, so, here goes... this is an amazing piece of art. You took something that everyone knows about, Green Lantern, and turned it into a mood in your own style. The picture is clear and beautifully taken, and the use of green shades is perfect. The gems seem to be glowing just as Green Lantern's lantern would be also. The vision is amazing, as you take two things that you enjoy and mix them together for beauty. I have never seen anyone do lip art, at least with this much dedication and love, before you. Your technique is great, and I don't know how it affects others, but I love it.
First off -I Love the intense contrast of colors between the green and black. The black lips stick strengthens to show off a little glam, not over powering but instead accentuates the lips. By also using the glitter effect, it gives off the appearance of a little green light bouncing right off; if light was to reflect off.
The rhinestones give it that natural "POP" factor in terms of resembling the bright glowing light that comes from the lantern itself.
Over all this looks awesome and you nailed it! Great job with this one! I Love!