Has anyone heard of adding to the front hairline without shaving down their hairline (blend it in the back of the piece). I'd like to not shave the parts of my hair yet fill in the front. Are there any tricks to getting it to look good. I have a front forward hairstyle a little height so I think unless you go digging in my hair you won't see it.

I know that picture of John Travolta you can see the lace over hair, but I'm not thinking of gluing on top of hair. Although that brings the question do people glue on top of a non shaved hairline (not a lot of hair like travoltas) Thanks