Edward Berthelot/Getty ImagesGetty Images Us Weekly has affiliate partnerships. We receive compensation when you click on a link and make a purchase. Learn more! Come March, I start to see those spring wedding invites fill my mailbox, and my search for the perfect dress immediately kicks into high gear. Because, honestly, no matter what's hanging in my closet, I always want a new wedding guest dress for the next big "I do." And this season, the slimming wedding guest dresses hitting the shelves are so good, they'll have you feeling every bit as stunning as the bride.