Join the celebration and participate in this exciting 'Say Cheese Challenge' All you have to do is follow these simple steps: Record a video of yourself saying "Cheeeese" for as long as you can in one go Upload your video on your Facebook & Instagram timeline with the hashtag #SayCheeseChallenge and tag @CaliforniaPizza The contestant who says cheese the longest, wins! Get a chance to win exciting prizes, Make sure to keep your post setting to public and, Share your entries latest by Sunday, 18t