Vocus/PRWEB April 15, 2010 — After considerable speculation, Celebrity Cruises the premium brand of Royal Caribbean Cruises Ltd formally announced the deployment of its newest ship, the Celebrity “Silhouetteâ€. As the fourth ship in Celebrity’s award-winning Solstice-class, the “Silhouette†will depart on her inaugural sailing July 23, 2011 with a 7-night cruise that will include …