Modern French Style Icons

"You have to look like you've made no effort even if you really have," the singer says. "French girls don't wash their hair as much and they don't wear much makeup. Everything is very discreet, except for nonchalant touches — say a bag or a pair of shoes."

At left, Josephine de la Baume at the Fall 2012 Lacoste show in New York in February 2012.