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Formal Dinners : Keep it classic with a white shirt and silk tie

The image spread like wildfire and, from Facebook to Twitter to media sites, everyone is mystified

A cocktail dress shorter, possibly ritzier might cut it if your host is of a relaxed nature, but its best to assume that a floor-sweeping number is expected

Plus, they say butterflies are good luck on your wedding day, and you can spot several little ones sewn onto this floral black dress

A floor-length gown is the safest choice, but a very dressy midi dress, formal cocktail dress, ankle-length dress, or elegant jumpsuit can also work if the outfit looks polished and evening-appropriate