The OPI Gwen collection has so many different types of polishes like the creme gloss, satin, glitter, and chrome. OPI has had this amazing picture of Gwen featuring "Hey Baby" creme gloss and "4 in the Morning" satin polish as their main pic on their site and you can see why. The glossy and flat contrast is lots of fun.
1. Apply natural base coat
2. Polish on 2 coats of "Hey Baby" Creme Gloss Polish, apply top coat and dry
3. Outline a rectangle with "4 in the Morning" Satin Polish with a nail art brush so it more precise and then fill in the rectangle with the same polish.
It was easy as that and now you can rock out with your fab, Gwen Stefani OPI look.