Behind the scenes at Marc Jacobs Spring 2011 New York Fashion Week show, we caught up with beauty dream team François Nars, Guido Palau and Jan Arnold. The NARS Cosmetics founder talked about the inspiration behind the bleached-brow on the runway, while Redken creative consultant Guido talked about Vogue’s Grace Coddington being a possible muse. CND Nail's Jan also chimed in with new Spring trends.