Hey, Use a stippling brush and apply the foundation as if you are massaging it into the skin

air brush look? yeah, it's called photoshop.
essentially.

Found this for you!

"First, just dot your liquid foundation on the following areas: the forehead, chin, cheeks, and tip of the nose. Next, using circular motions, simply blend in the foundation with a blush brush. The tightly packed bristles help provide coverage but still remain pouffy enough to give a soft application. For a similar option, try Sephora's Professionnel Platinum Air Brush #55 ($34) or Philosophy Supernatural Airbrush Brush ($25)."
http://www.bellasugar.com/How-Fake-Airbrush-Makeup-Look-9093901

agree with Renderella