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We can't wait to find out what the "Teenage Dream" singer wore on her big day, but no pictures are out yet. So we're taking our best, educated guess. Katy Perry is said to have worn a gray Elie Saab couture gown with lace sleeves. We dug around the latest couture collection and think this dramatic, lavishly detailed one might just be it! Out of respect for the intimacy of the event, Elie Saab's PR declined to comment on which dress Katy wore; however, they will confirm it was indeed Elie Saab couture. Tell us what you think in the comments: Can you see Katy going down the aisle in this?