How do i do my makeup like selena gomez in this picture?

Try a thin layer of eyeliner above your eyelash line. Then, apply a lot of mascara (not too much so that it's too clumpy) so that your lashes look long and pretty. Then, use eyeliner on the bottom as well, both inside your eye and on the rim of your eye. Put a bit of mascara on the bottom. Use a peachy-colored blush. As for your lips, use a very light pink/ color along with a clear lip plumper (if you have one). Good luck! :)