The best way to copy a celebrity's makeup style is by looking at the picture of that person. Save a few close up photos of Emily osment and try doing the same makeup. Just to help you, try light shades on your eyes, and put black color (pencil) inside your eyes. Go for rosy and obvious cheeks and a little darker shade of lipstick or lip gloss. The website where you can find which celebrity uses what makeup product is given below. Kindly go in celebrity category and click on celebrity makeup match. Hope it helps.
www.instyle.com
www.instyle.com