Kate Middleton and Prince William may not need to change outfits on the plane from Canada to California - but we are guessing Kate probably will.The Duke and Duchess of Cambridge honored the colors of the Canadian and American flag as they bid farewell to their future subjects.MUST READ: 'Discount Duchess' Kate Middleton Recycles Clothes! [VIDEO] MUST READ:Kate Middleton's Wardrobe: Too Extravagant? [PHOTOS]
