NEW YORK, Sept. 28, 2011 / — Leading Italian jewelry designer, Roberto Coin, has once again signed on with advocate, filmmaker and model, Christy Turlington Burns, to be the face for the third time in the upcoming 2011-2012 advertising campaign. The latest campaign will debut worldwide this October and feature jewelry from the Primavera, the new Bollicine, Cento Diamonds, Fantasia, Animalier and Ipanema collections. Turlington Burns is no stranger to the fashion world. Gracing the covers of over 1,000 top fashion publications, from Vogue to Time, Turlington Burns has not only been a leader in the fashion industry as one