Ah, hanging Christmas lights on stucco can be a bit of a challenge, but there are a few methods you can try. One option is to use a high-quality adhesive tape, which will stick to the stucco surface and hold the lights in place. Another option is to use plastic clips or staples, which you can find at most hardware stores. These will secure the lights to the stucco without causing any damage. Whichever method you choose, just be sure to take your time and use the appropriate tools to avoid any accidents or damage to your home. Happy decorating!