It's like Tangled! :D Floating lanterns will definitely light up your wedding or reception. Each guest writes a wish for the newlyweds on the lanterns and then, all together, they are released and light up the evening sky.
Dear future husband, At the end of their wedding slide show, a video of their proposal started to play. The groom had secretly taped it and then played it at their wedding to surprise his bride. Do this.