Popsugar Celebrity Katie Cassidy Pictures of Katie Cassidy, Chace Crawford, Gossip Girl 12 August 2010 by POPSUGAR Celebrity UK 0 Shares View On One Page Photo 0 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 0 Pictures of Katie Cassidy, Chace Crawford, Gossip Girl Previous Next Start Slideshow Katie CassidyChace CrawfordClemence PoesyGossip GirlLeighton Meester