What can i do to have clear fresh skin like Van Hudgens and Jasmine Villegas?

im 16, i dont have bad skin, but my skin isn't glowing and clear like Vanessa Hudgens, Hillary Duff and Jasmine Villegas.i have tried loads of things, cutting out junk food, using Bio Oil and Palmers scar serum for my eczema scars on my arm, and i use it also for my face incase i get blackheads and spots,i use cocoa er for mybody and neutrogena for my face but i just never seem to have that fresh clear peachy skin. what else can i do?