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Blair may be heading for her toughest relationship challenge yet, but she’ll face it and Chuck on Monday’s episode looking as fashionable as ever in a metallic Marc Jacobs dress, navy Moschino coat, cherry red Chanel tote and Kara Ross gold cuff. The road also looks bumpy for Serena and Nate as Jenny plots to sabotage the golden couple. Click on to get more dish about the upcoming episode (airing Monday, April 5 at 8p.m. EST on the CW) and find out exactly what the girls are wearing—head-to-toe!